Ensure compatibility with Vanilla when porting to 1.21.6 (convert existing Happier Ghasts to Minecraft's Happy Ghasts) #2
Description
Explain your suggestion here.
When 1.21.6 releases and we get Happy Ghasts, all of the existing Happier Ghasts should be converted to the vanilla mob, rather than disappearing. Updating this mod to convert the mobs for when the pre-releases / release candidates begin dropping would be the best way to keep up and would really help with ensuring that even if this mod is abandoned, existing Happy Ghasts won't disappear.
Describe alternatives you've considered
No alternatives unless you intend for servers / worlds to get rid of all existing Happy Ghasts.
Additional context
n/a