update docs theme

Author: ansibleguy

docs/source/conf.py

@@ -19,5 +19,8 @@
 source_suffix = {
     '.rst': 'restructuredtext',
 }
-html_theme_options = {}
+html_theme_options = {
+    "banner_text": 'Check out <a href="https://github.com/ansibleguy/collection_opnsense">the repository on GitHub</a> | '
+                   'Report <a href="https://github.com/ansibleguy/collection_opnsense/issues/new/choose">missing/incorrect information or broken links</a>'
+}
 html_short_title = 'Ansible Systemd'