make it a dataclass

src/axolotl/core/trainers/grpo/args.py

@@ -1,12 +1,15 @@
 """
 Axolotl Specific Training Args
 """
+from dataclasses import dataclass
+
 from trl import GRPOConfig
 
 from axolotl.core.training_args import AxolotlTrainingMixins
 
 
-class AxolotlGRPOConfig(AxolotlTrainingMixins, GRPOConfig):
+@dataclass
+class AxolotlGRPOConfig(GRPOConfig, AxolotlTrainingMixins):
     """
     Axolotl GRPO Config for GRPO training
     """