updated module schema docs

morpheus/modules/write_to_file.py

@@ -101,6 +101,7 @@ def node_fn(obs: mrc.Observable, sub: mrc.Subscriber):
 
         # Open up the file handle
         with open(output_file, "a") as out_file:
+
             def write_to_file(x: MessageMeta):
                 lines = convert_to_strings(x.df)