ci: macos-13 runner deprecated switch to macos-15-intel to continue x86_64 testing

Author: clemens-fricke

.github/workflows/main.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   macos_wheel:
-    runs-on: macos-13
+    runs-on: macos-15-intel
     strategy:
       matrix:
         arch: [x86_64]
@@ -26,7 +26,7 @@ jobs:
 
     - uses: actions/upload-artifact@v4
       with:
-        name: wheels-macos-13-${{ strategy.job-index }}
+        name: wheels-macos-15-intel-${{ strategy.job-index }}
         path: ./wheelhouse/*.whl
         retention-days: 1