[CI] Add ARM runner and bump macos runner python version to 3.12 (#260)

Author: fjosw

.github/workflows/pytest.yml

@@ -20,7 +20,9 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         include:
           - os: macos-latest
-            python-version: "3.10"
+            python-version: "3.12"
+          - os: ubuntu-24.04-arm
+            python-version: "3.12"
 
     steps:
       - name: Checkout source