build(deps): bump tokio in /tests/runtimes/simple-rofl-tdx

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.40.0 to 1.43.1.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.40.0...tokio-1.43.1)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.43.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

tests/runtimes/simple-rofl-tdx/Cargo.lock

@@ -15,4 +15,4 @@ oasis-core-keymanager = { path = "../../../keymanager" }
 anyhow = "1.0"
 async-trait = "0.1.82"
 rand = "0.8.5"
-tokio = { version = "1.40.0", features = ["rt", "rt-multi-thread", "sync"] }
+tokio = { version = "1.43.1", features = ["rt", "rt-multi-thread", "sync"] }