Fix biome history on 1.19

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/PaperweightGetBlocks_Copy.java

@@ -184,7 +184,7 @@ public class PaperweightGetBlocks_Copy implements IChunkGet {
             biomes = new PalettedContainer[getSectionCount()];
         }
         if (biomeData instanceof PalettedContainer<Holder<Biome>> palettedContainer) {
-            biomes[layer] = palettedContainer;
+            biomes[layer] = palettedContainer.copy();
         } else {
             LOGGER.error(
                     "Cannot correctly save biomes to history. Expected class type {} but got {}",