Re-add qemu step for multi-platform builds (#3)

* Re-add qemu step for multi-platform builds
* bump version of builx-action

Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

.github/workflows/docker-buildx.yml

@@ -44,10 +44,15 @@ jobs:
         with:
           cosign-release: 'v1.13.1'
 
+      -
+        # Add support for more platforms with QEMU (optional)
+        # https://github.com/docker/setup-qemu-action
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@79abd3f86f79a9d68a23c75a09a9a85889262adf
+        uses: docker/setup-buildx-action@v2.2.1
         with:
           platforms: linux/amd64,linux/arm64,linux/arm/v7