build(deps): update rand requirement from 0.8 to 0.9

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]>

bach/Cargo.toml

@@ -24,7 +24,7 @@ futures-core = { version = "0.3", default-features = false }
 intrusive-collections = "0.9"
 pin-project-lite = "0.2"
 metrics = { version = "0.24", optional = true }
-rand = { version = "0.8", default-features = false }
+rand = { version = "0.9", default-features = false }
 rand_xoshiro = "0.6"
 tracing = { version = "0.1", optional = true }