Change runner to array format in build_images.yml

Author: dclong

.github/workflows/build_images.yml

@@ -16,7 +16,7 @@ on:
         default: ''
 jobs:
   build_docker_images:
-    runs-on: self-hosted
+    runs-on: [self-hosted]
     steps:
       - uses: actions/checkout@v3
         with: