Tweak.

.github/workflows/post-release.yml

@@ -30,7 +30,7 @@ jobs:
         # the version tag which is typically NOT on the first commit so we
         # retrieve them all.
         fetch-depth: 0
-        ref: ${{ inputs.tag || github.ref }}
+        ref: ${{ github.event_name == 'workflow_dispatch' && github.ref || inputs.tag }}
 
     - name: Create GitHub Pull Request to update stable build version in props
       if: |