Bump tokio from 1.28.0 to 1.29.0 in /src/proxy-manager

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.28.0 to 1.29.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.28.0...tokio-1.29.0)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

src/proxy-manager/Cargo.toml

@@ -20,7 +20,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 storage-queue = { path = "../agent/storage-queue" }
 thiserror = "1.0"
-tokio = { version = "1.28", features = [
+tokio = { version = "1.29", features = [
     "macros",
     "rt-multi-thread",
     "fs",