CFC: Update Common Input Aspects

Hey folks,

This CFC is a follow-up of last week's one. After feedback, we made a small
changed the words "used in preprocessing" to "processed on the server";

You can see the complete PR here:
https://github.com/w3c/wcag-act/pull/526/files

This call for consensus ends on March 3rd at the start of the ACT TF call.
Please respond with +1 if you support this change, or with -1 if you have
strong objections to the change.

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