Update to macos-13 runner.

Author: auouymous

.github/workflows/build.yml

@@ -9,7 +9,7 @@ jobs:
       github.event_name == 'push' ||
       github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
 
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
       - uses: actions/checkout@v4
         with: