Update rand requirement from ^0.8.5 to ^0.9.0

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@0.8.5...0.9.0)

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

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

Cargo.toml

@@ -86,7 +86,7 @@ optional = true
 [dev-dependencies]
 mockito = "^1.5.0"
 rdkafka = { version = "^0.37.0", features = ["cmake-build"] }
-rand = "^0.8.5"
+rand = "^0.9.0"
 test_utils = { path = "test_utils" }
 tokio = { version = "^1.40.0", features = ["macros"] }