Update apps/portal/src/app/engine/features/account-abstraction/page.mdx

Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>
Signed-off-by: Joaquim Verges <[email protected]>

Author: joaquim-verges

apps/portal/src/app/engine/features/account-abstraction/page.mdx

@@ -68,7 +68,7 @@ Grant & revoke sessions on an account which allow specific wallets to interact w
 
 Make write calls with a smart account by calling a write endpoint and specify the `x-backend-wallet-address` and `x-account-address` headers.
 
-The `x-backend-wallet-address` should be set to the Engine backend wallet that has been granted signing permission by the smart account's admin through a [session key](https://portal.thirdweb.com/references/typescript/v5/erc4337/addSessionKey)
+The `x-backend-wallet-address` should be set to the Engine backend wallet that has been granted signing permission by the smart account's admin through a [session key](https://portal.thirdweb.com/references/typescript/v5/erc4337/addSessionKey).
 
 The `x-account-address` should be set to the deployed smart account address itself.