Updated elgohr/Publish-Docker-Github-Action to a supported version (v5) (#37)

Author: elgohr

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@master
     - name: Publish to Registry
-      uses: elgohr/Publish-Docker-Github-Action@master
+      uses: elgohr/Publish-Docker-Github-Action@v5
       with:
         name: spruiktec/packml-simulator
         username: ${{ secrets.DOCKER_USERNAME }}