Deprecate and add note to regenerateChunk method

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

paper-api/src/main/java/org/bukkit/World.java

@@ -254,7 +254,11 @@ public interface World extends PluginMessageRecipient, Metadatable {
      * @param x X-coordinate of the chunk
      * @param z Z-coordinate of the chunk
      * @return Whether the chunk was actually regenerated
+     *
+     * @deprecated regenerating a single chunk is not guaranteed to produce the
+     * same chunk as before as terrain decoration may be spread across chunks
      */
+    @Deprecated
     public boolean regenerateChunk(int x, int z);
 
     /**