Bumps [axe-core](https://github.com/dequelabs/axe-core) from 3.5.5 to 4.0.0.
- [Release notes](https://github.com/dequelabs/axe-core/releases)
- [Changelog](https://github.com/dequelabs/axe-core/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/dequelabs/axe-core/compare/v3.5.5...v4.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>