CI: set buildkitd-config-inline instead of config-inline

Author: sandhose

.github/workflows/build.yaml

@@ -195,7 +195,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/[email protected]
         with:
-          config-inline: |
+          buildkitd-config-inline: |
             [registry."docker.io"]
               mirrors = ["mirror.gcr.io"]