do not suggest that QA suggestion is always improvement
in many cases users thought that all suggestions are improvement
this change attempts to lessen this false impression
PR triggered by https://community.openstreetmap.org/t/proposed-automated-edit-removal-of-crossing-markings-yes-tags-introduced-in-undiscussed-automated-edits/129614 and https://github.com/openstreetmap/iD/pull/11029
In my experience iD's suggestions often make things worse (often when a previous tagging was not quite right for a real-life feature, but iD's "suggestions" are far worse).
"changed" is certainly better than "upgraded" - my personal suggestion for wording would likely be much ruder and unlikely to be accepted here :)