restore anchor in communication guide (#1692)

(cherry picked from commit e9bedf7)

docs/docsite/rst/community/communication.rst

@@ -64,14 +64,16 @@ You can add Matrix shields to your repository's ``README.md`` using the shield i
 
   IRC channels are no longer considered official communication channels. Please use the Forum and Matrix instead.
 
+.. _general_channels:
+
 General channels
 ----------------
 
 The clickable links will take you directly to the relevant Matrix room in your browser; room/channel information is also given for use in other clients:
 
 - `Community social room and posting news for the Bullhorn newsletter <https://matrix.to:/#/#social:ansible.com>`_
 - `General usage and support questions <https://matrix.to:/#/#users:ansible.com>`_
-- `Discussions on developer topics and code related to features or bugs <https://matrix.to/#/#devel:ansible.com>`_ 
+- `Discussions on developer topics and code related to features or bugs <https://matrix.to/#/#devel:ansible.com>`_
 - `Discussions on community and collections related topics <https://matrix.to:/#/#community:ansible.com>`_
 
 Working group-specific channels