[Docs] Fix: Add missing import (#6657)

Signed-off-by: Reza Rahemtola <[email protected]>

Author: RezaRahemtola

apps/portal/src/app/react/v5/account-abstraction/get-started/page.mdx

@@ -61,6 +61,7 @@ With this property, all connected wallets will be automatically converted to sma
 
 ```tsx
 import { createThirdwebClient } from "thirdweb";
+import { sepolia } from "thirdweb/chains";
 import { ThirdwebProvider, ConnectButton } from "thirdweb/react";
 
 const client = createThirdwebClient({
@@ -86,6 +87,7 @@ You can also make it so *only* in-app wallets get converted to smart accounts, b
 
 ```tsx
 import { createThirdwebClient } from "thirdweb";
+import { sepolia } from "thirdweb/chains";
 import { ThirdwebProvider, ConnectButton } from "thirdweb/react";
 
 const client = createThirdwebClient({
@@ -167,4 +169,4 @@ Refer to the [Smart Wallet API reference](/references/typescript/v5/smartWallet)
 	description="More advanced configuration of your smart accounts"
 />
 
-</Stack>
+</Stack>