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

Author: rxiddhi

doc/api/fs.md

@@ -7736,9 +7736,9 @@ 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'`