fix MacOS CI (#1772)

Author: zariiii9003

.github/workflows/ci.yml

@@ -26,6 +26,14 @@ jobs:
           "pypy-3.8",
           "pypy-3.9",
         ]
+        # Python 3.9 is on macos-13 but not macos-latest (macos-14-arm64)
+        # https://github.com/actions/setup-python/issues/696#issuecomment-1637587760
+        exclude:
+          - { python-version: "3.8", os: "macos-latest", experimental: false }
+          - { python-version: "3.9", os: "macos-latest", experimental: false }
+        include:
+          - { python-version: "3.8", os: "macos-13", experimental: false }
+          - { python-version: "3.9", os: "macos-13", experimental: false }
         # uncomment when python 3.13.0 alpha is available
         #include:
         #  # Only test on a single configuration while there are just pre-releases