Update app.py

app.py

@@ -690,7 +690,7 @@ with aba_feedback:
                 )
                 try:
                     res = client.models.generate_content(
-                        model="gemini-1.5-flash",
+                        model="gemini-3.5-flash",
                         contents=prompt_fb,
                         config=types.GenerateContentConfig(temperature=0.2)
                     )