Update docker/setup-buildx-action action to v2 (#127)

Author: renovate[bot]

.github/workflows/push.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
+        uses: docker/setup-buildx-action@v2
       - name: Cache Go modules
         uses: actions/cache@v3
         with: