Bump constant_time_eq from 0.3.1 to 0.5.0 in /codex-rs

Bumps [constant_time_eq](https://github.com/cesarb/constant_time_eq) from 0.3.1 to 0.5.0.
- [Changelog](https://github.com/cesarb/constant_time_eq/blob/main/CHANGES)
- [Commits](cesarb/constant_time_eq@0.3.1...0.5.0)

---
updated-dependencies:
- dependency-name: constant_time_eq
  dependency-version: 0.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

codex-rs/Cargo.lock

@@ -300,7 +300,7 @@ clatter = { version = "2.2.0", default-features = false, features = [
     "use-sha",
 ] }
 color-eyre = "0.6.3"
-constant_time_eq = "0.3.1"
+constant_time_eq = "0.5.0"
 crossbeam-channel = "0.5.15"
 crypto_box = { version = "0.9.1", features = ["seal"] }
 crossterm = "0.28.1"