feat(axe-core 4.9.1): Axe core version upgrade for Web

[rohittarpara]

Details

This PR updates axe-core to its latest version, 4.9.1, from 4.8.4. It also bumps the accessibility-insights-report package version.

See also Minor version upgrade 4.9.0 release notes

Motivation

Part of Feature 2187203 (internal access required to view).

Pull request checklist

• [ ] Addresses an existing issue: #0000
• [ ] Ran yarn fastpass
• [x] Added/updated relevant unit test(s) (and ran yarn test)
• [x] Verified code coverage for the changes made. Check coverage report at: <rootDir>/test-results/unit/coverage
• [x] PR title AND final merge commit title both start with a semantic tag (fix:, chore:, feat(feature-name):, refactor:). See CONTRIBUTING.md.
• [ ] (UI changes only) Added screenshots/GIFs to description above
• [ ] (UI changes only) Verified usability with NVDA/JAWS