Fix roleToRecipients descriptions (#46737)

Closes #45287

Access Request plugin guides describe the value of the
`roleToRecipients` field in Access Request plugin Helm charts as taking
either a single string or an array of strings as the value of each
mapping. This change fixes the error in all Access Request plugin guides
that include this Helm chart value.

docs/pages/admin-guides/access-controls/access-request-plugins/ssh-approval-discord.mdx

@@ -208,8 +208,7 @@ To determine the numeric ID of a channel for the bot to notify, follow the instr
 </Tabs>
 
 In the `role_to_recipients` map, each key is the name of a Teleport role. Each
-value configures the Discord channel (or channels) to notify. The value can be a
-single string or an array of strings.
+value configures the Discord channel (or channels) to notify.
 
 The `role_to_recipients` map must also include an entry for `"*"`, which the
 plugin looks up if no other entry matches a given role name. In the example
@@ -222,17 +221,26 @@ by adding the following to your `role_to_recipients` config (replace
 
 <Tabs>
 <TabItem label="Executable or Docker">
+
+Here is an example of a `role_to_recipients` map. Each value can be a single
+string or an array of strings:
+
 ```toml
 [role_to_recipients]
 "*" = "YOUR-CHANNEL-ID"
 "editor" = "YOUR-CHANNEL-ID"
 ```
 </TabItem>
 <TabItem label="Helm Chart">
+
+In the Helm chart, the `role_to_recipients` field is called `roleToRecipients`
+and uses the following format, where keys are strings and values are arrays of
+strings:
+
 ```yaml
 roleToRecipients:
-  "*": "YOUR-CHANNEL-ID"
-  "editor": "YOUR-CHANNEL-ID"
+  "*": ["YOUR-CHANNEL-ID"]
+  "editor": ["YOUR-CHANNEL-ID"]
 ```
 </TabItem>
 </Tabs>

docs/pages/admin-guides/access-controls/access-request-plugins/ssh-approval-email.mdx

@@ -202,11 +202,12 @@ recipients that the email plugin will notify when a user requests access to a
 specific role. When the plugin receives an Access Request from the Auth Service,
 it will look up the role being requested and identify the recipients to notify.
 
-Here is an example of a `role_to_recipients` map:
-
 <Tabs>
 <TabItem label="Executable or Docker">
 
+Here is an example of a `role_to_recipients` map. Each value can be a single
+string or an array of strings:
+
 ```toml
 [role_to_recipients]
 "*" = ["security@example.com", "executive-team@example.com"]
@@ -217,20 +218,23 @@ Here is an example of a `role_to_recipients` map:
 </TabItem>
 <TabItem label="Helm Chart">
 
+In the Helm chart, the `role_to_recipients` field is called `roleToRecipients`
+and uses the following format, where keys are strings and values are arrays of
+strings:
+
 ```yaml
 roleToRecipients:
   "*": ["security@example.com", "executive-team@example.com"]
-  "dev": "eng@example.com"
-  "dba": "mallory@example.com"
+  "dev": ["eng@example.com"]
+  "dba": ["mallory@example.com"]
 ```
 
 </TabItem>
 </Tabs>
 
 In the `role_to_recipients` map, each key is the name of a Teleport role. Each
 value configures the recipients the plugin will email when it receives an Access
-Request for that role. The value can be a single string or an array of strings.
-Each string must be an email address.
+Request for that role.  Each string must be an email address.
 
 The `role_to_recipients` map must also include an entry for `"*"`, which the
 plugin looks up if no other entry matches a given role name. In the example

docs/pages/admin-guides/access-controls/access-request-plugins/ssh-approval-msteams.mdx

@@ -256,16 +256,17 @@ the correct information, which you obtained earlier in this guide.
 
 #### `[role_to_recipients]`
 
-The `role_to_recipients` map (`roleToRecipients` for Helm users) configure the users and channels that the
-Microsoft Teams plugin will notify when a user requests access to a specific role. When
-the Microsoft Teams plugin receives an Access Request from the Auth Service, it will
-look up the role being requested and identify the Microsoft Teams users and channels to
-notify.
+The `role_to_recipients` map (`roleToRecipients` for Helm users) configures the
+users and channels that the Microsoft Teams plugin will notify when a user
+requests access to a specific role. When the Microsoft Teams plugin receives an
+Access Request from the Auth Service, it will look up the role being requested
+and identify the Microsoft Teams users and channels to notify.
 
 <Tabs>
 <TabItem label="Executable or Docker">
 
-Here is an example of a `role_to_recipients` map:
+Here is an example of a `role_to_recipients` map. Each value can be a single
+string or an array of strings:
 
 ```toml
 [role_to_recipients]
@@ -276,7 +277,9 @@ Here is an example of a `role_to_recipients` map:
 </TabItem>
 <TabItem label="Helm Chart">
 
-Here is an example of a `role_to_recipients` map:
+In the Helm chart, the `role_to_recipients` field is called `roleToRecipients`
+and uses the following format, where keys are strings and values are arrays of
+strings:
 
 ```toml
 roleToRecipients:
@@ -288,9 +291,8 @@ roleToRecipients:
 </Tabs>
 
 In the `role_to_recipients` map, each key is the name of a Teleport role. Each
-value configures the Teams user (or users) to notify. The value can be a single
-string or an array of strings. Each string must be either the email address of
-a Microsoft Teams user or a channel URL.
+value configures the Teams user (or users) to notify. Each string must be either
+the email address of a Microsoft Teams user or a channel URL.
 
 You can find the URL of a channel by opening the channel and clicking the button
 "Get link to channel":

docs/pages/admin-guides/access-controls/access-request-plugins/ssh-approval-slack.mdx

@@ -206,7 +206,8 @@ requested and identify the Slack channels to notify.
 
 <Tabs>
 <TabItem label="Executable or Docker">
-Here is an example of a `role_to_recipients` map:
+Here is an example of a `role_to_recipients` map. Each value can be a
+single string or an array of strings:
 
 ```toml
 [role_to_recipients]
@@ -216,26 +217,26 @@ Here is an example of a `role_to_recipients` map:
 ```
 </TabItem>
 <TabItem label="Helm Chart">
-In our Helm chart, the `role_to_recipients` field is called `roleToRecipients`
-and uses the following format:
+In the Helm chart, the `role_to_recipients` field is called `roleToRecipients`
+and uses the following format, where keys are strings and values are arrays of
+strings:
 
 ```yaml
 roleToRecipients:
-  "*": "admin-slack-channel"
+  "*": ["admin-slack-channel"]
   "dev":
     - "dev-slack-channel"
     - "admin-slack-channel"
-  "dba": "alex@gmail.com"
+  "dba": ["alex@gmail.com"]
 ```
 </TabItem>
 </Tabs>
 
 In the `role_to_recipients` map, each key is the name of a Teleport role. Each
-value configures the Slack channel (or channels) to notify. The value can be a
-single string or an array of strings. Each string must be either the name of a
-Slack channel (including a user's direct message channel) or the email address
-of a Slack user. If the recipient is an email address, the Slack plugin will
-use that email address to look up a direct message channel.
+value configures the Slack channel (or channels) to notify. Each string must be
+either the name of a Slack channel (including a user's direct message channel)
+or the email address of a Slack user. If the recipient is an email address, the
+Slack plugin will use that email address to look up a direct message channel.
 
 The `role_to_recipients` map must also include an entry for `"*"`, which the
 plugin looks up if no other entry matches a given role name. In the example