doc: correct 'event handle' to 'event handler' in Utf8Stream drop event

Author: rxiddhi

doc/api/fs.md

@@ -7736,9 +7736,7 @@ to allow continued writing.
 
 #### Event: `'drop'`
 
-The `'drop'` event is emitted when to maximal length is reached and that data
-will not be written. The data that was dropped is passed as the first argument
-to the event handle.
+The `'drop'` event is emitted when the maximum length is reached and the data will not be written. The data that was dropped is passed as the first argument to the event handler.
 
 #### Event: `'error'`