Skip check when not on tag

Skip checking version when running on untagged branches

Initial Public Offering

Action that compares the Info.plist version against the current tag (must start with "v" e.g. "v1.01") and fails the workflow if they do not match

Official major version

to enable selecting @v1 for GitHub Actions,

see https://docs.github.com/en/actions/creating-actions/about-actions#using-tags-for-release-management