Update the column actions to action to fit in lerebot 2.1

Replace UR3 LeRobot v2.1 dataset | obs.state=(11,) float32 [eef_x,eef_y,eef_z,r1x,r1y,r1z,r2x,r2y,r2z,gripper,gripper] | action=(7,) float32 [tcp_x.vel,tcp_y.vel,tcp_z.vel,tcp_rx.vel,tcp_ry.vel,tcp_rz.vel,gripper.cmd] | images.<cam>=(H,W,3) video

Upload README.md with huggingface_hub

Upload folder using huggingface_hub

initial commit