Update generation_config.json

generation_config.json

@@ -7,6 +7,7 @@
     128009
   ],
   "temperature": 0.6,
-  "top_p": 0.9,
+  "top_p": 0.95,
+  "top_k": 20,
   "transformers_version": "4.49.0"
 }