Bump commons from 3e9677f to d67fa36 (#856)

Bumps [commons](https://github.com/heroku/buildpacks-ruby) from `3e9677f` to `d67fa36`.
- [Release notes](https://github.com/heroku/buildpacks-ruby/releases)
- [Commits](heroku/buildpacks-ruby@3e9677f...d67fa36)

---
updated-dependencies:
- dependency-name: commons
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>