Update app.py

app.py

@@ -29,7 +29,8 @@ models = {
         "deepseek-ai/deepseek-llm-67b-chat",
         "mistralai/Mixtral-8x22B-Instruct-v0.1",
         "NousResearch/Nous-Hermes-2-Mixtral-8x7B-DPO",
-        "google/gemma-2-9b-it"
+        "google/gemma-2-9b-it",
+        "google/gemma-2-27b-it"
     ]
 }