Add #contributor-helpline

pages/resources/help.md

@@ -14,4 +14,5 @@ Although Microsoft does not provide official support for TSDoc, there are commun
   the [tsdoc.org-website](https://github.com/microsoft/tsdoc.org-website/issues) GitHub project
 
 - **Zulip chat:** The Rush Stack chat server hosts a [#tsdoc](https://rushstack.zulipchat.com/#narrow/stream/266672-tsdoc)
-  stream where you can contact the project maintainers.
+  stream where you can contact the project maintainers.  For help with getting a PR merged, try the
+  [#contributor-helpline](https://rushstack.zulipchat.com/#narrow/stream/279883-contributor-helpline) stream.