Update to Minecraft 1.21.2

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/world/inventory/ContainerGrindstone.patch

@@ -56,15 +56,15 @@
              @Override
              public boolean mayPlace(ItemStack itemstack) {
                  return itemstack.isDamageableItem() || EnchantmentManager.hasAnyEnchantments(itemstack);
-@@ -125,6 +154,7 @@
-             this.addSlot(new Slot(playerinventory, j, 8 + j * 18, 142));
-         }
- 
+@@ -113,6 +142,7 @@
+             }
+         });
+         this.addStandardInventorySlots(playerinventory, 8, 84);
 +        player = (Player) playerinventory.player.getBukkitEntity(); // CraftBukkit
      }
  
      @Override
-@@ -137,7 +167,8 @@
+@@ -125,7 +155,8 @@
      }
  
      private void createResult() {
@@ -74,7 +74,7 @@
          this.broadcastChanges();
      }
  
-@@ -239,6 +270,7 @@
+@@ -227,6 +258,7 @@
  
      @Override
      public boolean stillValid(EntityHuman entityhuman) {