Use macos-arm64 runners. (#806)

* Use macos-arm64 runners.

* GitHub does not provide Python 3.8 on macos-14.

* Trigger CI.

Author: joaander

.github/workflows/run-pytest.yml

@@ -29,10 +29,10 @@ jobs:
           # Other tests
           - python: '3.8'
             dependencies: 'oldest'
-          - os: 'macos-latest'
-            python: '3.8'
+          - os: 'macos-14'
+            python: '3.10'
             dependencies: 'oldest'
-          - os: 'macos-latest'
+          - os: 'macos-14'
             python: '3.12'
             dependencies: 'newest'
     steps: