More Chiseled Bookshelf Variants

1.6.1:

• 1.21.2, 1.21.3: Update to 1.21.2, 1.21.3
• Fixed the recipes incorrectly using slabs and books as ingredients, they now use planks and slabs just like their vanilla counterpart
• The recipes are now also grouped so that they only take up a combined 1 extra space in the recipe book
• 1.21(.1): Fixed the chiseled bookshelves not properly dropping themselves when mined

Looking for changes of previous versions?
You can find them in the changelog history.