OBS: nightly: add ".0" after versions on git tags
Fix that with the current logic of generating version numbers for
nightly, a version done on a tag can be higher than the following
version:
on tag: 1.14.0.202603231800
on tag (with this patch): 1.14.0.0.202603231800
next commit after the tag: 1.14.0.1.abcd.202603241800
Fixes: OS#6981
Change-Id: Id140d8ea76bf98357711587a9909d54097250fd6
