ci: remove macos-13 from required PR checks

Author: stirby

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-13]
+        os: [ubuntu-22.04]
 
     runs-on: ${{ matrix.os }}