bpo-44830: [doc] Restore missing Mozilla devguide link (GH-27818)

(cherry picked from commit 942d1a4284e9341df47c48d7c63e921136dc9719)

Co-authored-by: Jack DeVries <[email protected]>

Author: miss-islington

Doc/bugs.rst

@@ -80,6 +80,10 @@ taken on the bug.
       Article which goes into some detail about how to create a useful bug report.
       This describes what kind of information is useful and why it is useful.
 
+   `Bug Writing Guidelines <https://bugzilla.mozilla.org/page.cgi?id=bug-writing.html>`_
+      Information about writing a good bug report.  Some of this is specific to the
+      Mozilla project, but describes general good practices.
+
 .. _contributing-to-python:
 
 Getting started contributing to Python yourself