Update macOS runners in Actions workflow

actions/runner-images#13046 macos 13 runners are gone, switching to latest

Author: Akari202

.github/workflows/python.yml

@@ -117,9 +117,9 @@ jobs:
     strategy:
       matrix:
         platform:
-          - runner: macos-13
+          - runner: macos-15-intel
             target: x86_64
-          - runner: macos-14
+          - runner: macos-latest
             target: aarch64
     steps:
       - uses: actions/checkout@v4