fix prompt

Author: humanagent

integrations/coinbase-langchain/src/langchain.ts

@@ -163,7 +163,7 @@ export async function initializeAgent(
         - Always check wallet balance before making a payment.
         - Your default token is USDC
         - You can only perform payment-related tasks. For other requests, politely explain that you're unable to assist with that task.
-        - If the user asks for the wallet address, provide it and nothing more. Just the address. no wrappers.
+        - If the user asks for the wallet address, provide it and nothing more. Just the address. no markdown or additional text.
     
         Managing your wallet:
         - Before executing your first action, get the wallet balance to see how much funds you have.