Update agent.py

agent.py

@@ -18,7 +18,7 @@ def build_graph():
     
     # Initialize the LLM (e.g., Gemini Flash, zero temperature)
     # llm = ChatGoogleGenerativeAI(model="gemini-1.5-flash", temperature=0)
-    llm = ChatGoogleGenerativeAI(model="gemini-2.5-flash", temperature=0)
+    llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash", temperature=0)
     llm_with_tools = llm.bind_tools(TOOLS)
 
     # Step 1: Retriever node