Use macOS 15 in workflow for building wheels.

Author: plusvic

.github/workflows/publish-to-pypi.yml

@@ -25,7 +25,7 @@ jobs:
             arch: i686
           - os: ubuntu-24.04
             arch: aarch64
-          - os: macos-12
+          - os: macos-15
             arch: x86_64 universal2
           - os: windows-2022
             arch: x86