Final call: Remove "clip" from Scrollable element definition #1401

Hey folks,
Small PR fixing a bug in the scrollable element definition. The final call
lasts for 1 week, closing on July 30th. If you have any concerns, please
leave a review:

https://github.com/act-rules/act-rules.github.io/pull/1401

Kind regards,

-- 
*Wilco Fiers*
Axe for Web product owner - Co-facilitator WCAG-ACT - Chair ACT-R