Dependabot fails to bump to v2 as v1 and v2 are branches, not tags

[consideRatio]

I want us to transition to using v1 and v2 etc tags instead of branches, because apparently dependabot doesn't succeed in bumping to v2 if we have a branch set like that rather than a tag.

This is determined by ...

action-k3s-helm/.github/workflows/release_updates.yml

Lines 24 to 27 in 5ae641f

	with:
	# By using branches as identifiers it is still possible to backtrack
	# some patch, but not if we use tags.
	prefer_branch_releases: true

I think the v1 version of this action fails to handle k8s 1.24 due to an too outdated version of calico, and k3s 1.24 is out now making tests fail in z2jh for example.