[fix] Get tag from github.ref_name

Author: rosamaggi

.github/workflows/release-on-semver-tag.yml

@@ -75,6 +75,6 @@ jobs:
     needs: release
     uses: ./.github/workflows/sync-to-wp-theme-2018-on-release.yml
     with:
-      tag_name: ${{ github.event.inputs.tag_name }}
+      tag_name: ${{ github.ref_name }}
     secrets:
       ELEMENTS_PRIVATE_KEY: ${{ secrets.ELEMENTS }}