It looks like what you're asking is for someone who has access to Nancy Bertrand's WikiTree profile to please make a correction on her page from the (apparently mistaken) maiden name of "Sarver" to the correct maiden name of "Saver." Is this correct?
Such a correction can be made by a WikiTree member, ideally once some solid source evidence is available. Since this concrete marker is not so clear, do you have any other sources that agree that Nancy's maiden name is actually "Saver" and not "Sarver"? If you do, then this is truly a straightforward correction for a WikiTree member to make. :-)
Thanks so much for sharing this photo, too--it's wonderful to have the photograph which preserves the writing and the way it looks now. Hopefully the gravesite will be cleaned up and cared for in the future, but if not, at least there is this photograph.