Final call: update autocomplete rule to current writing style

Hey folks,
I have updated the current autocomplete rule, to try to get it ready for
the ACT Task Force. This final call ends on September 1st. If you have any
feedback, please leave a review on the pull request:

https://github.com/act-rules/act-rules.github.io/pull/1415

Kind regards,

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