Merge pull request #79 from dokku/dependabot/github_actions/docker/se…

…tup-buildx-action-3

chore(deps): bump docker/setup-buildx-action from 2 to 3

.github/workflows/docker-push.yml

@@ -59,7 +59,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
       - name: Login to DockerHub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v2