chore(deps): bump rand

Bumps the cargo group with 1 update in the /bots/echidnabot directory: [rand](https://github.com/rust-random/rand).


Updates `rand` from 0.10.0 to 0.10.1
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.10.0...0.10.1)

---
updated-dependencies:
- dependency-name: rand
  dependency-version: 0.10.1
  dependency-type: direct:production
  dependency-group: cargo
...

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

Author: dependabot[bot]