fix: camel case (#136)

Author: Josephasafg

ai21/clients/studio/resources/chat/base_chat_completions.py

@@ -28,8 +28,8 @@ def _create_body(
                 "model": model,
                 "messages": [message.to_dict() for message in messages],
                 "temperature": temperature,
-                "maxTokens": max_tokens,
-                "topP": top_p,
+                "max_tokens": max_tokens,
+                "top_p": top_p,
                 "stop": stop,
                 "n": n,
                 "stream": stream,