chore: update docs to change Discussions link (#459)

Author: NathanTarbert

docs/development/contributing.mdx

@@ -14,4 +14,4 @@ contributor use the `community` prefix, i.e.
 (`typescript-sdk/integrations/community-your-integration`).
 
 For questions and discussions, please use
-[GitHub Discussions](https://github.com/orgs/ag-ui-protocol/discussions).
+[GitHub Discussions](https://github.com/ag-ui-protocol/ag-ui/discussions).