Fix staking benchmark (#6463)
Found by @ggwpez Fix staking benchmark, error was introduced when migrating to v2: https://github.com/paritytech/polkadot-sdk/pull/6025 --------- Co-authored-by:GitHub Action <[email protected]>
Found by @ggwpez Fix staking benchmark, error was introduced when migrating to v2: https://github.com/paritytech/polkadot-sdk/pull/6025 --------- Co-authored-by: