Bump axe-core from 4.7.2 to 4.8.2 in /thirdparty/WCAG

Bumps [axe-core](https://github.com/dequelabs/axe-core) from 4.7.2 to 4.8.2.
- [Release notes](https://github.com/dequelabs/axe-core/releases)
- [Changelog](https://github.com/dequelabs/axe-core/blob/develop/CHANGELOG.md)
- [Commits](dequelabs/axe-core@v4.7.2...v4.8.2)

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

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