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

Changed sprites for books on bookshelves, added one missing sprite

Resources/Prototypes/Entities/Structures/Furniture/bookshelf.yml

@@ -13,7 +13,7 @@
       - map: ["enum.StorageFillLayers.Fill"]
   - type: Appearance
   - type: StorageFillVisualizer
-    maxFillLevels: 20
+    maxFillLevels: 21
     fillBaseName: book
   - type: Damageable
     damageModifierSet: Wood

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

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