Backports list of available versions to 2.9 for Ansible 3 (#74265) (#74321)

* updates list of available versions for Ansible 3 (#74265)

(cherry picked from commit 126e9244c2)

* oops, also need to update pointer to latest

Co-authored-by: Alicia Cozine <acozine@users.noreply.github.com>

docs/docsite/rst/conf.py

@@ -145,9 +145,9 @@ html_context = {
     'github_root_dir': 'devel/lib/ansible',
     'github_cli_version': 'devel/lib/ansible/cli/',
     'current_version': version,
-    'latest_version': '2.10',
+    'latest_version': '3',
     # list specifically out of order to make latest work
-    'available_versions': ('latest', '2.9', '2.9_ja', '2.8', 'devel'),
+    'available_versions': ('latest', '2.9', 'devel'),
     'css_files': ('_static/ansible.css',  # overrides to the standard theme
                   ),
 }