chore(deps): bump rand (#5)

Bumps the cargo group with 1 update in the /vault-core directory: [rand](https://github.com/rust-random/rand).


Updates `rand` from 0.8.5 to 0.9.2
- [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...rand_core-0.9.2)

---
updated-dependencies:
- dependency-name: rand
  dependency-version: 0.9.2
  dependency-type: direct:production
  dependency-group: cargo
...

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Author: dependabot[bot]

vault-core/Cargo.lock

@@ -47,7 +47,7 @@ zeroize = { version = "1.7", features = ["derive"] }
 secrecy = "0.8"
 
 # Random number generation (CSPRNG)
-rand = "0.8"
+rand = "0.9"
 rand_chacha = "0.3"
 
 # Base64 encoding for armoring