fix: update n type in OpenAI Model (#1168)

Author: Wendong-Fan

camel/models/openai_model.py

@@ -123,7 +123,7 @@ def run(
 
             self.model_config_dict["temperature"] = 1.0
             self.model_config_dict["top_p"] = 1.0
-            self.model_config_dict["n"] = 1.0
+            self.model_config_dict["n"] = 1
             self.model_config_dict["presence_penalty"] = 0.0
             self.model_config_dict["frequency_penalty"] = 0.0