Update build.yaml

Author: timkpaine

.github/workflows/build.yaml

@@ -45,7 +45,8 @@ jobs:
             cibuildwheel: "cp311"
           - python-version: "3.13"
             cibuildwheel: "cp312"
-          steps:
+
+    steps:
     - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
     - uses: actions-ext/python/setup@main