build(deps): update rand_core requirement from 0.6 to 0.9

Updates the requirements on [rand_core](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@rand_core-0.6.0...rand_core-0.9.2)

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

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

Author: dependabot[bot]

Cargo.toml

@@ -34,7 +34,7 @@ lazy_static = "1.4"
 proptest = "1.0"
 rand = "0.8"
 rand_chacha = "0.3"
-rand_core = "0.6"
+rand_core = "0.9"
 serde_json = "1.0"
 
 frost-core = { path = "frost-core", version = "2.1.0", default-features = false }

frost-core/Cargo.toml

@@ -22,7 +22,7 @@ debugless-unwrap = "0.0.4"
 derive-getters = "0.5.0"
 hex.workspace = true
 postcard = { version = "1.0.0", features = ["alloc"], optional = true }
-rand_core = { version = "0.6", default-features = false }
+rand_core = { version = "0.9", default-features = false }
 serde = { version = "1.0.160", default-features = false, features = ["derive"], optional = true }
 serdect = { version = "0.2.0", optional = true }
 thiserror-nostd-notrait = { version = "1.0.29", default-features = false }