bump macos runner

uses macos-15 (arm) ad macos-15-intel (x86_64) github-hosted runner images

Author: 2bndy5

.github/workflows/python-packaging.yml

@@ -139,9 +139,9 @@ jobs:
       fail-fast: false
       matrix:
         platform:
-          - runner: macos-13
+          - runner: macos-15-intel
             target: x86_64
-          - runner: macos-14
+          - runner: macos-15
             target: aarch64
     steps:
       - uses: actions/checkout@v6