Use 3.04 tag for elgohr/Publish-Docker-Github-Action

Author: atoomic

.github/workflows/publish-to-docker.yml

@@ -35,7 +35,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Publish to Registry
-        uses: elgohr/Publish-Docker-Github-Action@v3
+        uses: elgohr/Publish-Docker-Github-Action@3.04
         with:
           name: ${{ secrets.DOCKER_REPO }}
           username: ${{ secrets.DOCKER_USERNAME }}