Nits found during the bumping fellows repo (#3410)

cumulus/parachains/runtimes/contracts/contracts-rococo/src/lib.rs

@@ -427,6 +427,7 @@ mod benches {
 		[pallet_sudo, Sudo]
 		[pallet_timestamp, Timestamp]
 		[pallet_collator_selection, CollatorSelection]
+		[cumulus_pallet_parachain_system, ParachainSystem]
 		[pallet_contracts, Contracts]
 		[pallet_xcm, PalletXcmExtrinsicsBenchmark::<Runtime>]
 	);