[SDK] Fix useSetActiveWallet code example in JSDoc (#5444)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR focuses on renaming a variable for clarity in the `useSetActiveWallet` hook implementation within the `useSetActiveWallet.ts` file.

### Detailed summary
- Renamed the variable `setActiveAccount` to `setActiveWallet` for consistency with the hook name.
- Updated the usage of the variable to `await setActiveWallet(wallet);` to reflect the new name.

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Author: MananTank

packages/thirdweb/src/react/core/hooks/wallets/useSetActiveWallet.ts

@@ -9,10 +9,10 @@ import { useConnectionManagerCtx } from "../../providers/connection-manager.js";
  * ```jsx
  * import { useSetActiveWallet } from "thirdweb/react";
  *
- * const setActiveAccount = useSetActiveWallet();
+ * const setActiveWallet = useSetActiveWallet();
  *
  * // later in your code
- * await setActiveAccount(account);
+ * await setActiveWallet(wallet);
  * ```
  * @walletConnection
  */