references to GitHub discussions for extension authors (microsoft#159682)

Author: isidorn

.github/commands.json

@@ -23,7 +23,7 @@
 		"name": "*dev-question",
 		"action": "close",
 		"reason": "not_planned",
-		"comment": "We have a great developer community [over on slack](https://aka.ms/vscode-dev-community) where extension authors help each other. This is a great place for you to ask questions and find support.\n\nHappy Coding!"
+		"comment": "We have a great extension developer community over on [GitHub discussions](https://github.com/microsoft/vscode-discussions/discussions) and [Slack](https://aka.ms/vscode-dev-community) where extension authors help each other. This is a great place for you to ask questions and find support.\n\nHappy Coding!"
 	},
 	{
 		"type": "label",

README.md

@@ -43,6 +43,7 @@ please see the document [How to Contribute](https://github.com/microsoft/vscode/
 * [Request a new feature](CONTRIBUTING.md)
 * Upvote [popular feature requests](https://github.com/microsoft/vscode/issues?q=is%3Aopen+is%3Aissue+label%3Afeature-request+sort%3Areactions-%2B1-desc)
 * [File an issue](https://github.com/microsoft/vscode/issues)
+* Connect with the extension author community on [GitHub Discussions](https://github.com/microsoft/vscode-discussions/discussions) or [Slack](https://aka.ms/vscode-dev-community)
 * Follow [@code](https://twitter.com/code) and let us know what you think!
 
 See our [wiki](https://github.com/microsoft/vscode/wiki/Feedback-Channels) for a description of each of these channels and information on some other available community-driven channels.