Per discussion in [mozilla's "expose placeholder object attribute for HTML placeholder" bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1303429#c12): reintroduce `placeholder` as a final means to determine an `input`'s accessible name, if all other checks return no value. Update changelog to call out this update.
Per discussion in mozilla's "expose placeholder object attribute for HTML placeholder" bug: reintroduce
placeholderas a final means to determine aninput's accessible name, if all other checks return no value.Update changelog to call out this update.