Improve code comments

Author: Jack251970

Flow.Launcher/ViewModel/ResultsViewModel.cs

@@ -346,7 +346,7 @@ public void Update(List<ResultViewModel> newItems, CancellationToken token = def
             {
                 _token = token;
 
-                // Since NewResults may need to clear existing results, do not check token cancellation here!
+                // Since NewResults may need to clear existing results, so we cannot check token cancellation here
                 if (Count == 0 && newItems.Count == 0)
                     return;