Merge pull request #5 from authzed/docker-workingdir

docker-build: bump action version

docker-build/action.yaml

@@ -26,7 +26,7 @@ runs:
     - uses: "docker/setup-buildx-action@v1"
       with:
         driver-opts: "image=moby/buildkit:master"
-    - uses: "docker/build-push-action@v1"
+    - uses: "docker/build-push-action@v2"
       with:
         context: "${{ inputs.context }}"
         file: "${{ inputs.file }}"