1.21 FIX

This is a temporary fix of RotatingHeads2 for versions 1.20.6+

At this moment, support for versions older than 1.18 is broken, I might fix it in the next release, but there is no need to since for older versions, you can just stay on the official version.

There is now a hard coded cool down of 0.5 seconds for head actions (clicking on heads), because spam clicking caused lag on the new versions.