Call for review: form-field descriptive label, Improve the examples

Hey folks,

This pull request makes the following changes to the Form field label is
descriptive rule:
- Ensure inapplicable examples don't fail the SC
- Make it clearer why some of these failed examples are failing.

If you have any comments, please leave a review before May 24th:
https://github.com/act-rules/act-rules.github.io/pull/1809

-- 
*Wilco Fiers*
Axe-core & Axe-linter product owner - WCAG 3 Project Manager - Facilitator
ACT Task Force