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] <support@github.com>

Cargo.toml

@@ -25,7 +25,7 @@ hmac-sha512 = { version = "1.1.6", features = ["traits010", "sha384"] }
 k256 = { version = "0.13.4", features = ["ecdsa", "std", "pkcs8", "pem"] }
 p256 = { version = "0.13.2", features = ["ecdsa", "std", "pkcs8", "pem"] }
 p384 = { version = "0.13.0", features = ["ecdsa", "std", "pkcs8", "pem"] }
-rand = "=0.8.5"
+rand = "=0.9.0"
 serde = { version = "1.0.217", features = ["derive"] }
 serde_json = "1.0.138"
 thiserror = "2.0.11"