[Communication] update help and fix chat command group preview info (#…

…5257)

* [Communication] update command group name to start with upper case

* [Communication] update help file.

* [Communication] the whole 'communication chat' group should appear as preview.

* [Communication] bump the version.

* [Communication] update history

* Update _help.py

* [Communication] fix preview and deprecated flags for sms and phonenumbers

* [Communication] update release history.

* [Communication] remove trailing white space

Co-authored-by: ZelinWang <zelinwang@microsoft.com>

src/communication/HISTORY.rst

@@ -3,6 +3,12 @@
 Release History
 ===============
 
+1.2.1
+++++++
+ * Update command helps
+ * Fix bugs preview and deprecated flags
+
+
 1.2.0
 ++++++
 * Add communication chat command group in preview mode.

src/communication/azext_communication/__init__.py

@@ -66,7 +66,7 @@ def _register_data_plane_account_arguments(self, command_name, arguments):
         if not command:
             return
 
-        group_name = 'communication'
+        group_name = 'Communication'
         if 'connection_string' in arguments:
             command.add_argument('connection_string', '--connection-string', required=False, default=None,
                                  validator=validate_client_parameters, arg_group=group_name,