Thumb rings are rings

BUR #57820 has been approved by @nonamethanks.

create implication thumb_ring -> ring

The wiki specifies that it's for rings worn on a thumb so this should make sense as it's one of the ring tags that doesn't have an implication to ring. The value of the tag is a bit dubious though; as a standalone concept to find things like post #11145216 is one thing but most of these posts are multiple rings anyway so it evades me why thumb is a special case in having a specific finger tag but we don't have one for rings on the index, middle or little finger unless those are desirable too and just haven't been made.

WRS said in forum #433501:

so it evades me why thumb is a special case in having a specific finger tag but we don't have one for rings on the index, middle or little finger unless those are desirable too and just haven't been made.

When I hear "thumb ring", my first thought would be the kind of ring used in archery (https://en.wikipedia.org/wiki/Thumb_ring). They are a bit different from normal rings, usually larger and thicker. That's why it has its own tag, I suppose.

When it comes to danbooru purposes, a thumb ring is still a ring and users will tag it on any posts with a normal ring on a thumb, like the post you mentioned.

So if we want to make this tag a bit more useful, then it needs to be gardened and changed to something like thumb ring (archery)

The bulk update request #57820 (forum #433501) has been approved by @nonamethanks.