Update `pallet-multisig` benches (#12558)

* Typo

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* ".git/.scripts/bench-bot.sh" pallet dev pallet_multisig

* remove functions

* ".git/.scripts/bench-bot.sh" pallet dev pallet_multisig

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: command-bot <>
Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>