Dungeons and Taverns Stronghold Overhaul

• Updated Pack Formart to 1.21.9 cause they include now minor datapack versions
• Updated loot tables to not include chains but iron_chains so they dont break for 1.21.9

Updated to 1.21.5

• Fixed Loot tables for 1.21.4
• Added 2 new hallway types for every Stronghold Section

Fixed The Bookshelves, that where suposed to have only normal books, to all be Efficency 3 books.