Merge PR #34146 into master

* refs/pull/34146/head:
	mgr/cephadm: use docker.io in default container image name
	mgr/cephadm: fix 'upgrade start' message when specifying a version

Reviewed-by: Michael Fritch <mfritch@suse.com>

diff --cc src/pybind/mgr/cephadm/module.py
Simple merge