Set a higher default value(1.2) about repetition_penalty for codegen …

…example to reduce repetition (#820)

Signed-off-by: Yao, Qing <qing.yao@intel.com>

comps/cores/mega/gateway.py

@@ -222,7 +222,7 @@ async def handle_request(self, request: Request):
             temperature=chat_request.temperature if chat_request.temperature else 0.01,
             frequency_penalty=chat_request.frequency_penalty if chat_request.frequency_penalty else 0.0,
             presence_penalty=chat_request.presence_penalty if chat_request.presence_penalty else 0.0,
-            repetition_penalty=chat_request.repetition_penalty if chat_request.repetition_penalty else 1.03,
+            repetition_penalty=chat_request.repetition_penalty if chat_request.repetition_penalty else 1.2,
             streaming=stream_opt,
         )
         result_dict, runtime_graph = await self.megaservice.schedule(