Bump dotbot-brew from 84b228f to 86da20a

Bumps [dotbot-brew](https://github.com/d12frosted/dotbot-brew) from `84b228f` to `86da20a`.
- [Commits](d12frosted/dotbot-brew@84b228f...86da20a)

---
updated-dependencies:
- dependency-name: dotbot-brew
  dependency-type: direct:production
...

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