chore(deps): bump tokio from 1.39.3 to 1.40.0 (#1494)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.39.3 to 1.40.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.39.3...tokio-1.40.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -36,7 +36,7 @@ p256 = "=0.14.0-pre.1"
 rstest = "0.22"
 sha2 = { version = "=0.11.0-pre.4", features = ["oid"] }
 tempfile = "3.5.0"
-tokio = { version = "1.39.3", features = ["macros", "rt"] }
+tokio = { version = "1.40.0", features = ["macros", "rt"] }
 x509-cert-test-support = { path = "./test-support" }
 
 [features]