Update gemini_client.py

gemini_client.py

@@ -22,7 +22,7 @@ class GeminiClient:
         genai.configure(api_key=self.api_key)
 
         # Use Gemini 2.5 Flash model
-        self.model = genai.GenerativeModel('gemini-2.5-flash')
+        self.model = genai.GenerativeModel('gemini-2.0-flash')
 
         # Generation config for better output
         self.generation_config = {