add update_frontend_image for 3.3

Author: alexandredevely

opsdocs/mkdocs.yml

@@ -143,6 +143,8 @@ nav:
      - Update and custom frontend image : 'common/3.0/update_frontend_image.md'
      - Mount a nfs resource inside a user desktop: common/3.0/mount_nfs_tag.md
      - RFC 2307 multiple groups and user securityContext on pod: common/3.0/multiplegroupsfeature.md
+   - Release 3.3:
+     - Update and custom frontend image : 'common/3.3/update_frontend_image.md'
    - Debug you own application : common/debug_application.md
    - Define access control for an application : common/acl.md
    - Upload and from files with your desktop : 'common/upload_and_download_files.md'