Use xcbeautify instead of xcpretty

Signed-off-by: Marcel Müller <[email protected]>

.github/workflows/uitests.yml

@@ -111,7 +111,7 @@ jobs:
         -test-iterations 3 \
         -retry-tests-on-failure \
         -resultBundlePath "testResult.xcresult" \
-        -quiet
+        | xcbeautify --quieter
 
     - name: Upload test results
       uses: actions/upload-artifact@v4