[doc] Param name consistency

examples/run_lm_finetuning.py

@@ -428,7 +428,7 @@ def main():
     parser.add_argument('--gradient_accumulation_steps', type=int, default=1,
                         help="Number of updates steps to accumulate before performing a backward/update pass.")
     parser.add_argument("--learning_rate", default=5e-5, type=float,
-                        help="The initial learning rate for Adam optimizer.")
+                        help="The initial learning rate for Adam.")
     parser.add_argument("--weight_decay", default=0.0, type=float,
                         help="Weight decay if we apply some.")
     parser.add_argument("--adam_epsilon", default=1e-8, type=float,