Changed no controllers found text

dashboard/src/main/home/cluster-dashboard/expanded-chart/events/EventsTab.tsx

@@ -86,7 +86,7 @@ const EventsTab: React.FC<{
     return (
       <Placeholder>
         <i className="material-icons">search</i>
-        No matching events were found.
+        We coulnd't find any controllers for this application.
       </Placeholder>
     );
   }