Bump rand in /examples/crate_universe/remove_internal_deps

Bumps [rand](https://github.com/rust-random/rand) from 0.7.3 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@0.7.3...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]

examples/crate_universe/remove_internal_deps/Cargo.lock

@@ -4,4 +4,4 @@ version = "0.1.0"
 edition = "2018"
 
 [dependencies]
-rand = "0.7.3"
+rand = "0.8.6"