When prepare-release tags HEAD with a new release version, do-release should
immediately detect that tag rather than finding the latest tag chronologically.
Changes:
- Modified detect-tag step to check if HEAD is exactly at a tag first
- Falls back to latest tag only if HEAD is not tagged
- Fixes issue where v1.0.2 was detected instead of v1.1.0 at HEAD
This ensures correct version detection in prepare-release → do-release workflow chain.
a6d57e4048