Uncomment macOS 3.12 in CI matrix for testing

Author: bhimrazy

.github/workflows/ci-testing.yml

@@ -21,7 +21,7 @@ jobs:
         os: ["ubuntu-latest"]
         python-version: ["3.10", "3.11", "3.12"]
         include:
-          # - { os: "macos-latest", python-version: "3.12" }
+          - { os: "macos-latest", python-version: "3.12" }
           - { os: "windows-latest", python-version: "3.11" }
           - { os: "ubuntu-22.04", python-version: "3.10", requires: "oldest" }