Docs: fix broken links (#71911)

* Fix different broken links and missing pages

* Pin version in docs link for release announcements

* fixing validator error

---------

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

docs/sources/developers/http_api/correlations.md

@@ -1,7 +1,7 @@
 ---
 aliases:
   - ../../http_api/correlations/
-canonical: /docs/grafana/latest/developers/http_api/correlation/
+canonical: /docs/grafana/latest/developers/http_api/correlations/
 description: Grafana Correlations HTTP API
 keywords:
   - grafana