Allow StakingAdmin to set min_commission (#13018)

* staking admin can set min commission

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

* fmt

* fix for pr comments

Co-authored-by: command-bot <>

substrate/frame/staking/src/benchmarking.rs

@@ -922,6 +922,13 @@ benchmarks! {
 		);
 	}
 
+	set_min_commission {
+		let min_commission = Perbill::max_value();
+	}: _(RawOrigin::Root, min_commission)
+	verify {
+		assert_eq!(MinCommission::<T>::get(), Perbill::from_percent(100));
+	}
+
 	impl_benchmark_test_suite!(
 		Staking,
 		crate::mock::ExtBuilder::default().has_stakers(true),