default setting --tool-keys to tools (THUDM#1352)

Author: UbeCc

slime/utils/arguments.py

@@ -548,7 +548,7 @@ def add_data_arguments(parser):
             parser.add_argument(
                 "--tool-key",
                 type=str,
-                default=None,
+                default="tools",
                 help=(
                     "When need to add tools during apply_chat_template, you should provide the key for the tools in the prompt dataset."
                 ),