Call for review: Add example generic-title example to title-descriptive rule

Hey folks,
As suggested by Detlev, this PR adds a failed example do the Descriptive
titles rule, of a page that has a title too generic to be descriptive:
https://github.com/act-rules/act-rules.github.io/pull/1964

If you have any comments, please leave a review before November 4th.

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