Build(deps): Bump rand from 0.8.3 to 0.8.4

Bumps [rand](https://github.com/rust-random/rand) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.3...0.8.4)

---
updated-dependencies:
- dependency-name: rand
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -31,7 +31,7 @@ log = { version = "0.4.14", features = ["serde", "std"] }
 nix = "0.21.0"
 parking_lot = "0.11.1"
 proc-mounts = "0.2.4"
-rand = "0.8.3"
+rand = "0.8.4"
 rayon = "1.5.1"
 serde = { version = "1.0.126", features = ["derive"] }
 serde_json = "1.0.64"