Update migration.mdx

docs/develop/wallet-kit/migration.mdx

@@ -72,7 +72,10 @@ import { useWallet, useConnectedWallet } from '@terra-money/wallet-kit';
 
 2. Fix minor code changes. The `WalletStatus` enum now has the `CONNECTED` property instead of `WALLET_CONNECTED`. `availableConnections` and `availableInstallations` have been consolidated into `availableWallets`.
 
+<Admonition type="caution" icon="📖" title="API">
 You can refer to the [WalletKit README](https://github.com/terra-money/wallet-kit#key-differences-with-wallet-provider) for more information on the WalletKit API. 
+</Admonition>
+
 
 ```js
 const { connect, availableWallets } = useWallet();