Update test.yml

Author: gulivero1773

.github/workflows/test.yml

@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   macos-unit:
-    runs-on: macOS-13
+    runs-on: macOS-15
     steps:
     - uses: actions/checkout@v4
     - name: Switch Xcode 🔄