Actions: switch to macos-latest-large

macos-latest is currently an alias for macOS 14 Arm64, use
macos-latest-large instead.

[1] actions/runner-images#9741
[2] https://github.com/actions/runner-images#available-images

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
         os:
           - ubuntu-latest
           - windows-latest
-          - macos-latest
+          - macos-latest-large
         python-version:
           - "3.7"
           - "3.8"