Align release versions for the release and the contained files

[maxmoehl]

The releases are tagged as v1.2.3 but the file names omit the leading v which makes automated handling of the files a bit cumbersome. Other releases omit the v entirely.

We should at least consistently have the v or not, probably the best way would be to follow the pattern other releases use.

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs within 15 days.