Pin Xcode version

Author: Pattio

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Select Xcode 16.3
-        run: sudo xcode-select -s /Applications/Xcode_15.3.app
+        run: sudo xcode-select -s /Applications/Xcode_16.3.app
 
       - uses: swift-actions/setup-swift@v2
         with: