Updated TODO

TODO.md

@@ -15,14 +15,14 @@ In no particular order, here is a semi-current list of things to be done in Info
 
 [ ] Item pages - Add clickable links on Subjects
 
-[ ] Item pages - Add clickable links on Identifiers
-
 [ ] Add share button/link on item page
 
 [ ] Menu - change categories to media types and hook to latest list
 
 [ ] Add image (mostly Pixabay) credits
 
+[x] Item pages - Add clickable links on Identifiers
+
 [x] Add link to project repo
 
 [x] Hook up social graphs and metadata on basic title search