fix: add macOS 13 to CI workflow matrix

Author: Ki-Seki

.github/workflows/python-tests.yml

@@ -27,6 +27,7 @@ jobs:
           - "ubuntu-latest"
           - "windows-latest"
           - "macos-latest"
+          - "macos-13"
         python-version:
           - "3.10"
           - "3.11"