Specify requirement for delay-chunk-unloads-by to be set for preloading

worldedit-core/src/main/java/com/fastasyncworldedit/core/configuration/Settings.java

@@ -321,7 +321,7 @@ public class Settings extends Config {
                 " - Higher values use more memory and isn't noticeably faster",
                 " - A good (relatively) safe way to set this is",
                 " - Use 32 x GB of RAM / number of players expected to be using WE at the same time",
-                " - Paper and derivatives only."
+                " - Paper and derivatives only. (requires delay-chunk-unloads-by to be set)."
         })
         // Renamed from PRELOAD_CHUNK because it was set to 100000... something that lots of servers will now have which is
         // wayyy too much...