[tool] Fix tool calling output

Author: xyang16

engines/python/setup/djl_python/output_formatter.py

@@ -335,8 +335,8 @@ def _json_chat_output_formatter(request_output: TextGenerationOutput):
             "message": {
                 "role": "assistant",
                 "content": "",
+                "tool_calls": tool_calls,
             },
-            "tool_calls": tool_calls,
             "logprobs": None,
             "finish_reason": best_sequence.finish_reason,
         }
@@ -353,8 +353,8 @@ def _json_chat_output_formatter(request_output: TextGenerationOutput):
                 "message": {
                     "role": "assistant",
                     "content": tool_call_info.content,
+                    "tool_calls": tool_calls,
                 },
-                "tool_calls": tool_calls,
                 "logprobs": None,
                 "finish_reason": "tool_calls",
             }