Update Rust crate tokio-util to 0.7

Author: renovate[bot]

Cargo.lock

@@ -19,7 +19,7 @@ thiserror = "1.0"
 time = { version="0.3", default-features=false, features=["local-offset", "macros", "serde", "serde-human-readable", "std"] }
 tokio = { version="1.23", default-features=false, features=["macros", "rt-multi-thread", "time"] }
 tokio-stream = { version="0.1", default-features=false }
-tokio-util = { version="0.6", default-features=false, features=["time"] }
+tokio-util = { version="0.7", default-features=false, features=["time"] }
 
 # Console integration
 colored = { version="2.0", default-features=false }