ci: workaround for failing builds

failed to copy: io: read/write on closed pipe

- use DockerHub instead of dhcr.io
- ref: https://github.com/containerd/containerd/issues/7972

.github/workflows/ci_docker.yml

@@ -50,6 +50,11 @@ jobs:
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v2
+        # Workaround for failing builds: https://github.com/docker/build-push-action/issues/761#issuecomment-1383822381
+        # TODO remove workaround when fixed
+        with:
+          driver-opts: |
+            image=moby/buildkit:v0.10.6
 
       - name: Login to DockerHub
         uses: docker/login-action@v2

.github/workflows/ci_release.yml

@@ -107,6 +107,11 @@ jobs:
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v2
+        # Workaround for failing builds: https://github.com/docker/build-push-action/issues/761#issuecomment-1383822381
+        # TODO remove workaround when fixed
+        with:
+          driver-opts: |
+            image=moby/buildkit:v0.10.6
 
       - name: Login to DockerHub
         uses: docker/login-action@v2