Update bugs.rst (GH-9648)

Doc/bugs.rst

@@ -17,7 +17,7 @@ Documentation bugs
 
 If you find a bug in this documentation or would like to propose an improvement,
 please submit a bug report on the :ref:`tracker <using-the-tracker>`.  If you
-have a suggestion how to fix it, include that as well.
+have a suggestion on how to fix it, include that as well.
 
 If you're short on time, you can also email documentation bug reports to
 docs@python.org (behavioral bugs can be sent to python-list@python.org).