fix: fall back to git tag on HEAD when version input is not propagated

publish/action.yml

@@ -52,6 +52,9 @@ runs:
         elif [[ "${GITHUB_REF_VALUE}" == refs/tags/* ]]; then
           tag="${GITHUB_REF_VALUE#refs/tags/}"
           normalized="${tag#v}"
+        elif head_tag="$(git describe --exact-match --tags HEAD 2>/dev/null)" && [[ -n "$head_tag" ]]; then
+          tag="$head_tag"
+          normalized="${tag#v}"
         else
           echo "A version input is required when the workflow is not running from a tag push" >&2
           exit 1