Add VertaaUX Audit to Monitoring section

[PetriLahdelma]

Summary

Adds VertaaUX Audit to the Monitoring section, alongside the existing Lighthouse actions.

What it is

Runs UX, accessibility, and conversion audits on any URL from CI. Score-based quality gates fail builds when scores drop below thresholds; baseline comparison surfaces regressions in PR comments. Audits 7 categories: usability, clarity, information architecture, accessibility (axe-core + WCAG), keyboard navigation, semantics, conversion.

Usage

- uses: vertaaux/audit-action@v1
  with:
    url: https://example.com
    api-key: ${{ secrets.VERTAAUX_API_KEY }}
    threshold: 80

Guidelines checklist

• Alphabetically adjacent to Lighthouse actions (same use-case neighborhood)
• Entry follows the - [Descriptive title](url) - Additional description. format used in the section
• Single-suggestion PR
• Action is live on the GitHub Marketplace

[Copilot]

Pull request overview

Adds VertaaUX Audit to the README’s Monitoring section to complement existing Lighthouse-based monitoring/auditing actions.

Changes:

• Add a new Monitoring list entry for the VertaaUX Audit GitHub Action (Marketplace link) with a short description of its capabilities.

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