Fix YAML

Author: vstinner

.github/workflows/build.yml

@@ -18,9 +18,8 @@ jobs:
         # https://github.com/actions/setup-python/blob/main/docs/advanced-usage.md#allow-pre-releases
         # See "allow-prereleases: true" below.
         os: [ubuntu-latest]
-        container:
-          # Use the Fedora container to get more Python versions
-          image: fedora:latest
+        # Use the Fedora container to get more Python versions
+        container: fedora:latest
         python:
           # Python versions (CPython):
           # https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json