Update app.py

app.py

@@ -25,9 +25,9 @@ class GaiaLangGraphAgent:
         print("Initializing GaiaLangGraphAgent...")
         load_dotenv()
 
-        google_api_key = os.getenv("GOOGLE_API_KEY")
+        google_api_key = os.getenv("GEMINI_API_KEY")
         if not google_api_key:
-            raise ValueError("GOOGLE_API_KEY secret not found. Please set it in your Hugging Face Space settings.")
+            raise ValueError("GEMINI_API_KEY secret not found. Please set it in your Hugging Face Space settings.")
 
         class AgentState(TypedDict):
             question: str