Upgrade Docker login action to version 2

Author: nfancy

.github/workflows/workflow_master.yaml

@@ -41,7 +41,7 @@ jobs:
 
 
       - name: Login to DockerHub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}