Upgrade psycopg2-binary

This newer version has ready-built wheel packages for Python 3.10, so we
won't need to have gcc installed in our production runner image.

Author: Frost

app/requirements.txt

@@ -7,6 +7,6 @@ django-static-precompiler ~= 1.8.2
 markdown ~= 3.1.1
 gunicorn ~= 19.9.0
 django-environ ~= 0.4.5
-psycopg2-binary ~= 2.8.3
+psycopg2-binary ~= 2.9.11
 python-dateutil ~= 2.8.0
 django-post_office ~= 3.5.2