Add line about worldborder api changes

Author: kennytv

src/content/posts/1.21.11.mdx

@@ -51,8 +51,9 @@ Beds had a few substantial changes in Vanilla, so our events were updated with t
 
 ### Other additions and changes
 
-Here is a small selection of other changes and additions we have made since the stable release of 1.21.10:
+Beyond API for all the new 1.21.11 features, here is a small selection of other changes and additions we have made since the stable release of 1.21.10:
 
+- [WorldBorder](<https://jd.papermc.io/paper/1.21.11/org/bukkit/WorldBorder.html#changeSize(double,long)>) and [WorldBorderBoundsChangeEvent](<https://jd.papermc.io/paper/1.21.11/io/papermc/paper/event/world/border/WorldBorderBoundsChangeEvent.html#getDurationTicks()>) have had their methods returning/using millisecond durations deprecated and replaced with methods usign tick durations isntead
 - Added API on `LivingEntity` to [change waypoint styling](<https://jd.papermc.io/paper/1.21.11/org/bukkit/entity/LivingEntity.html#setWaypointStyle(net.kyori.adventure.key.Key)>)
 - Added [wobble API](<https://jd.papermc.io/paper/1.21.11/org/bukkit/block/DecoratedPot.html#startWobble(org.bukkit.block.DecoratedPot.WobbleStyle)>) on `DecoratedPot`
 - Added [more data getters](<https://jd.papermc.io/paper/1.21.11/org/bukkit/JukeboxSong.html#getDescription()>) to `JukeboxSong`