Fix formatting in Cargo.toml (#3842)

Fixes formatting for
https://github.com/paritytech/polkadot-sdk/pull/3698

polkadot/node/subsystem-bench/Cargo.toml

@@ -56,7 +56,7 @@ bitvec = "1.0.1"
 kvdb-memorydb = "0.13.0"
 
 parity-scale-codec = { version = "3.6.1", features = ["derive", "std"] }
-tokio = { version = "1.24.2", features = ["rt-multi-thread", "parking_lot"] }
+tokio = { version = "1.24.2", features = ["parking_lot", "rt-multi-thread"] }
 clap-num = "1.0.2"
 polkadot-node-subsystem-test-helpers = { path = "../subsystem-test-helpers" }
 sp-keyring = { path = "../../../substrate/primitives/keyring" }