Remove macos-12 from CI.

Author: vsajip

.github/workflows/package-tests.yml

@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-12, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', 'pypy-2.7', 'pypy-3.9']
         exclude:
           # macos-latest does not have Python 3.7