Update rand requirement from 0.8 to 0.9 in /codec

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.0...0.9.0)

---
updated-dependencies:
- dependency-name: rand
  dependency-type: direct:production
...

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

codec/Cargo.toml

@@ -22,7 +22,7 @@ cli-clipboard = { version = "0.4", default-features = false, optional = true }
 clap = { version = "4.5", default-features = false, features = ["derive", "help", "color", "error-context", "suggestions", "usage"], optional = true }
 
 [dev-dependencies]
-rand = { version = "0.8", default-features = false, features = ["alloc", "std", "std_rng"] }
+rand = { version = "0.9", default-features = false, features = ["alloc", "std", "std_rng"] }
 unicode-segmentation = { version = "1.12", features = ["no_std"] }
 
 [features]