ci: use MacOS 14 runner (#278)

Author: json-derulo

.github/workflows/verify-build.yml

@@ -68,7 +68,7 @@ jobs:
         run: npm run test -- --watch=false --browsers=FirefoxHeadless
 
   test-safari:
-    runs-on: macos-latest
+    runs-on: macos-14
     steps:
       - name: Checkout
         uses: actions/checkout@v4