ci: Switch to macOS 13 for 2024

We don't have universal2 wheels published for Python < 3.11.

Author: auscompgeek

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: ["ubuntu-22.04", "macos-14", "windows-2022"]
+        os: ["ubuntu-22.04", "macos-13", "windows-2022"]
         python_version:
         - '3.8'
         - '3.9'