Update docker/login-action action to v2 (#126)

Author: renovate[bot]

.github/workflows/push.yml

@@ -32,12 +32,12 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
       - name: Login to DockerHub
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Log in to GitHub Container registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           registry: ghcr.io
           username: ${{ github.actor }}