Fix leg IK animation issues

EasyMMD

EasyMMD is a versatile MMD player and synthesis tool that functions on both PC desktop and VR headsets. In addition to supporting VMD animation on PMX/PMD/VRM models, it also enables the playback of VMD animations on common 3D formats such as FBX/OBJ.Moreover, it directly supports Mixamo animations.

I'm very sorry, there was an issue with the previous version update, and the leg IK animation cannot be applied properly. It has now been fixed.