Update Rust crate tower to 0.5.0

Author: renovate-bot

crates/testkit/Cargo.toml

@@ -50,7 +50,7 @@ hyper-util = { version = "0.1.7", features = [
 ] }
 testcontainers = { version = "0.21.0", optional = true }
 tokio = "1.39.3"
-tower = { version = "0.4.13", features = ["util"] }
+tower = { version = "0.5.0", features = ["util"] }
 
 [dev-dependencies]
 tokio = { version = "1.39.3", features = ["rt", "macros"] }