use xcode 16.4

Author: robertherber

.github/workflows/test.yml

@@ -166,7 +166,7 @@ jobs:
           restore-keys: xcode-cache-deriveddata-${{ github.workflow }}-
 
       - name: Set up Xcode version
-        run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
+        run: sudo xcode-select -s /Applications/Xcode_16.4.app
 
       - name: Check Swift version
         run: swift --version