Curation happens via iNat, not the forum
You go to the taxa: https://www.inaturalist.org/taxa/53789-Tiarella-cordifolia
and then click the “curation” drop down which is on the right of “similar species”
click the “flag for curation”
Edit: seems to be the same change that sparked someone making this thread? https://forum.inaturalist.org/t/please-dont-change-common-names-when-you-change-scientific-names