Fix typo in MuJoCo docs.
Fix typo in MuJoCo docs.

PiperOrigin-RevId: 474414621
Change-Id: I0585d0f087fcf82ddb0b606f9680a9ffebeddc67

deepmind/mujoco,deepmind/mujoco,deepmind/mujoco,deepmind/mujoco,deepmind/mujoco