Adding max_tokens to autogenstudio LLMConfig (microsoft#1574)

* Adding max_tokens to autogenstudio LLMConfig

* fix formatting issue

* fix formatting issues

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Co-authored-by: Victor Dibia <[email protected]>

Author: amihalik

samples/apps/autogen-studio/autogenstudio/datamodel.py

@@ -92,6 +92,7 @@ class LLMConfig:
     temperature: float = 0
     cache_seed: Optional[Union[int, None]] = None
     timeout: Optional[int] = None
+    max_tokens: Optional[int] = None
 
     def dict(self):
         result = asdict(self)