Fix finetuning unit test issue (intel#1367)

Signed-off-by: lvliang-intel <[email protected]>

Author: lvliang-intel

intel_extension_for_transformers/neural_chat/cli/cli_commands.py

@@ -228,7 +228,7 @@ def __init__(self):
         self.parser.add_argument(
             '--train_file', type=str, default=None, help='Specify train file path.')
         self.parser.add_argument(
-            '--max_steps', type=str, default=None, help='Specify max steps of finetuning.')
+            '--max_steps', type=int, default=None, help='Specify max steps of finetuning.')
 
     def execute(self, argv: List[str]) -> bool:
         """