Thank you (again!) GreenReaper. Indeed, the wikibase-docker repo should be archived, with a clear link to wikibase-release-pipeline if the former is meant to be replaced by the latter.

I was previously using the "bundle image" (wikibase/wikibase:1.35-bundle) as documented here: https://github.com/wmde/wikibase-docker/tree/master/wikibase but this github repo has not been updated (yet?).
I see that the new 1.35-2 image has also been published on docker hub in a different repo (wikibase/wikibase-bundle instead of wikibase/wikibase).