updated docs per review

Author: soheimam

docs/wallet-app/guides/chat-agents.mdx

@@ -283,7 +283,7 @@ We'll outline the standard and custom XMTP content types you can utilize in your
 - Content Type: `xmtp.org/transactionReference:1.0`
 - Purpose: Share blockchain transaction info
 
-### Base AppContent Types
+### Base App Content Types
 
 There are content types developed by the Base App team for agents in Coinbase Wallet. Other XMTP clients may not support these content types.