downgrade-macos-runner for NativeShims build from 14 to 13

Author: DennisDyallo

.github/workflows/build-nativeshims.yml

@@ -92,7 +92,7 @@ jobs:
 
   build-macos:
     name: Build macOS
-    runs-on: macos-14
+    runs-on: macos-13
     steps:
       - uses: actions/checkout@v4
       - run: |