Bump rand from 0.8.5 to 0.8.6

Bumps [rand](https://github.com/rust-random/rand) from 0.8.5 to 0.8.6.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/0.8.6/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.5...0.8.6)

---
updated-dependencies:
- dependency-name: rand
  dependency-version: 0.8.6
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -11,4 +11,4 @@ description = "Makes a kernel compatible with the bootloader crate"
 [dependencies]
 
 [dev-dependencies]
-rand = "0.8.4"
+rand = "0.8.6"

api/Cargo.toml

@@ -17,7 +17,7 @@ usize_conversions = "0.2.0"
 x86_64 = { version = "0.15.2" }
 xmas-elf = "0.8.0"
 raw-cpuid = "10.2.0"
-rand = { version = "0.8.4", default-features = false }
+rand = { version = "0.8.6", default-features = false }
 rand_hc = "0.3.1"
 uart_16550 = "0.3.2"
 log = "0.4.17"