Fix iOS testing target

Author: marcprux

.github/workflows/ci.yml

@@ -26,5 +26,5 @@ jobs:
         with:
           swift-version: '6.0'
       - name: "Test Swift Package on iOS"
-        run: xcodebuild test -sdk "iphonesimulator" -destination "platform=iOS Simulator,name=iPhone 15" -scheme "$(xcodebuild -list -json | jq -r '.workspace.schemes[-1]')"
+        run: xcodebuild test -sdk "iphonesimulator" -destination "platform=iOS Simulator,name=iPhone 15" -scheme "swift-syntax-Package"