Match descriptive book layout to linking books

src/main/resources/assets/rivencraft/lang/en_us.json

@@ -22,6 +22,7 @@
   "screen.rivencraft.book.bind": "Bind",
   "screen.rivencraft.book.link": "Link",
   "screen.rivencraft.book.unwritten": "This Descriptive Book is unwritten",
+  "screen.rivencraft.book.age_link": "Age Link",
   "screen.rivencraft.book.preview_pending": "Loading destination...",
   "screen.rivencraft.book.click_to_link": "Click the panel to link",
   "itemGroup.rivencraft": "Rivencraft"