Fix player items not dropping on death

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

paper-server/nms-patches/net/minecraft/server/level/EntityPlayer.patch

@@ -338,7 +338,7 @@
 -            IChatBaseComponent ichatbasecomponent = this.getCombatTracker().getDeathMessage();
 +        if (!keepInventory) {
 +            for (ItemStack item : this.getInventory().getContents()) {
-+                if (!item.isEmpty() && EnchantmentManager.has(item, EnchantmentEffectComponents.PREVENT_EQUIPMENT_DROP)) {
++                if (!item.isEmpty() && !EnchantmentManager.has(item, EnchantmentEffectComponents.PREVENT_EQUIPMENT_DROP)) {
 +                    loot.add(CraftItemStack.asCraftMirror(item));
 +                }
 +            }