docs: s/destroy/$destroy

Author: lookfirst

misc/tutorial/190_large_dataset.ngdoc

@@ -34,7 +34,7 @@ Demonstrates the following:
           $scope.gridOptions.data = data;
         });
 
-      $scope.$on('destroy', function(){
+      $scope.$on('$destroy', function(){
         canceler.resolve();  // Aborts the $http request if it isn't finished.
       });
     }]);