Actions macOS: update image to macos-15-intel

Author: albertosottile

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
 
   macos:
     name: Build for macOS
-    runs-on: macos-14-large
+    runs-on: macos-15-intel
     steps:
       - name: Checkout
         uses: actions/checkout@v2