Replace deprecated macos-12 with macos-13

Author: hugovk

.github/workflows/ci.yml

@@ -112,7 +112,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        os: [ubuntu-latest, macos-12, macos-latest]
+        os: [ubuntu-latest, macos-13, macos-latest]
         python:
           - "3.8"
           - "3.9"