Update appkit/flutter/core/actions.mdx

Co-authored-by: Copilot <[email protected]>

Author: quetool

appkit/flutter/core/actions.mdx

@@ -27,7 +27,7 @@ _appKitModal.launchBlockExplorer();
 
 ### - Reconnect relay
 
-In most cases it shouldn't be needed as it is called internally but this method is usefult to reconnect the relay when internet connection is back after inactivity.
+In most cases it shouldn't be needed as it is called internally but this method is useful to reconnect the relay when internet connection is back after inactivity.
 
 ```javascript
 await _appKitModal.reconnectRelay();