chore: auto-update metadata coverage in METADATA_SUPPORT.md [no ci]

Author: svc-cli-bot

METADATA_SUPPORT.md

@@ -4,7 +4,7 @@ This list compares metadata types found in Salesforce v65 with the [metadata reg
 
 This repository is used by both the Salesforce CLIs and Salesforce's VSCode Extensions.
 
-Currently, there are 673/718 supported metadata types.
+Currently, there are 674/718 supported metadata types.
 For status on any existing gaps, please search or file an issue in the [Salesforce CLI issues only repo](https://github.com/forcedotcom/cli/issues).
 To contribute a new metadata type, please see the [Contributing Metadata Types to the Registry](./contributing/metadata.md)
 
@@ -457,7 +457,7 @@ To contribute a new metadata type, please see the [Contributing Metadata Types t
 |MarketingAppExtActivity|❌|Not supported, but support could be added|
 |MarketingAppExtension|✅||
 |MatchingRules|✅||
-|McpServerDefinition|❌|Not supported, but support could be added|
+|McpServerDefinition|✅||
 |MediaAdSalesSettings|✅||
 |MediaAgentSettings|✅||
 |MeetingsSettings|✅||