Update ci.yaml

Author: khs1994

.github/workflows/ci.yaml

@@ -8,6 +8,8 @@ jobs:
   ci:
     runs-on: ubuntu-latest
     steps:
+      - run: |
+          docker manifest inspect moby/buildkit
       - run: |
           docker run -i --rm \
             -e DEST_DOCKER_USERNAME=${DOCKER_USERNAME} \