New sprites for books on bookshelves in order to look less sad. (#22874)

Changed sprites for books on bookshelves, added one missing sprite

Resources/Textures/Structures/Furniture/bookshelf.rsi/meta.json

@@ -76,6 +76,9 @@
     },
     {
       "name": "book-19"
+    },
+    {
+      "name": "book-20"
     }
   ]
 }