community[patch]: fix hunyuan message include chinese signature error (#22795) (#22796)

… (#22795)

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libs/community/langchain_community/chat_models/hunyuan.py

@@ -90,7 +90,7 @@ def _signature(secret_key: SecretStr, url: str, payload: Dict[str, Any]) -> str:
         value = payload[key]
 
         if isinstance(value, list) or isinstance(value, dict):
-            value = json.dumps(value, separators=(",", ":"))
+            value = json.dumps(value, separators=(",", ":"), ensure_ascii=False)
         elif isinstance(value, float):
             value = "%g" % value