Bump addons-linter from 3.7.0 to 3.8.0 (#535)

Bumps [addons-linter](https://github.com/mozilla/addons-linter) from 3.7.0 to 3.8.0.
- [Release notes](https://github.com/mozilla/addons-linter/releases)
- [Commits](mozilla/addons-linter@3.7.0...3.8.0)

---
updated-dependencies:
- dependency-name: addons-linter
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

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