Docs: Bring back the alias for external group sync HTTP API page (#69434)

* Docs: Bring back the alias for external group sync HTTP API page

* Update docs/sources/developers/http_api/team_sync.md

Co-authored-by: Jack Baldry <jack.baldry@grafana.com>

---------

Co-authored-by: Jack Baldry <jack.baldry@grafana.com>

docs/sources/developers/http_api/team_sync.md

@@ -1,6 +1,7 @@
 ---
 aliases:
-  - ../../http_api/team_sync/
+  - ../../http_api/external_group_sync/
+  - ./external_group_sync/
 canonical: /docs/grafana/latest/developers/http_api/team_sync/
 description: Grafana Team Sync HTTP API
 keywords: