Update app.py

app.py

@@ -34,7 +34,7 @@ def fix_srt_format(input_file, output_file):
 def initialize_agent():
     return Agent(
         name="Video AI Subtitle Generator",
-        model=Gemini(id="gemini-2.5-flash"),
+        model=Gemini(id="gemini-3.1-flash-lite-preview"),
         # model=Groq(id="llama-3.3-70b-versatile"),
         markdown=True,
     )