Bump pa11y from 6.1.0 to 6.2.0

Bumps [pa11y](https://github.com/pa11y/pa11y) from 6.1.0 to 6.2.0.
- [Release notes](https://github.com/pa11y/pa11y/releases)
- [Changelog](https://github.com/pa11y/pa11y/blob/master/CHANGELOG.md)
- [Commits](pa11y/pa11y@6.1.0...6.2.0)

---
updated-dependencies:
- dependency-name: pa11y
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]