build(deps): bump tokio-util from 0.7.14 to 0.7.15

Bumps [tokio-util](https://github.com/tokio-rs/tokio) from 0.7.14 to 0.7.15.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-util-0.7.14...tokio-util-0.7.15)

---
updated-dependencies:
- dependency-name: tokio-util
  dependency-version: 0.7.15
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -379,7 +379,7 @@ version = "0.1.17"
 
 # Useful async utilities
 [workspace.dependencies.tokio-util]
-version = "0.7.14"
+version = "0.7.15"
 features = ["rt"]
 
 # Tower services