Add ' '

Author: cxzhong

.github/workflows/ci-meson.yml

@@ -36,7 +36,7 @@ jobs:
             tests: 'new'
           # one additional editable run in pull_request, this has no effect if not pull_request
           - os: 'ubuntu'
-            python: 3.12
+            python: '3.12'
             editable: true
             tests: 'all'
           - os: windows