Update git submodules

Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Fixes Docker image upload for master/rocky"
  - Fixes Docker image upload for master/rocky

    The API has changed to create/upload the docker container images to be
    used for deployment. In the past the prepare commands would read the THT
    environment files passed, to determine which docker images to render
    into an environment file. The new behavior uses a new
    "containers-prepare-parameter.yaml" format (included in this patch),
    which Apex will now configure for deployment. By default docker images
    will be rendered for all TripleO services identified in the
    roles_data.yaml file. Therefore we must use several excludes patterns to
    only pull the docker images needed for a default deployment.

    JIRA: APEX-642

    Change-Id: Iab00fcb874554bb98540dc9a4c3051e58ea68a3b
    Signed-off-by: Tim Rozet <trozet@redhat.com>