Update rand requirement from 0.8 to 0.9 (#6)

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

central/Cargo.toml

@@ -13,7 +13,7 @@ shared = { workspace = true }
 serde = { workspace = true }
 futures = { workspace = true }
 serde_json = "1"
-rand = "0.8"
+rand = "0.9"
 reqwest = { version = "0.12", default_features = false, features = ["default-tls"] }
 urlencoding = "2.1.3"
 chrono = "0.4.39"