[Bukkit] Workaround string NBT data being wrapped with quotes in MC 1.21.5 (#2753)

Author: me4502

worldedit-bukkit/adapters/adapter-1_21_5/src/main/java/com/sk89q/worldedit/bukkit/adapter/ext/fawe/v1_21_5/PaperweightAdapter.java

@@ -959,7 +959,7 @@ public LinTag<?> toNativeLin(net.minecraft.nbt.Tag foreign) {
         } else if (foreign instanceof net.minecraft.nbt.ShortTag shortTag) {
             return LinShortTag.of(shortTag.shortValue());
         } else if (foreign instanceof net.minecraft.nbt.StringTag stringTag) {
-            return LinStringTag.of(stringTag.toString());
+            return LinStringTag.of(stringTag.value());
         } else if (foreign instanceof net.minecraft.nbt.EndTag) {
             return LinEndTag.instance();
         } else {