Minor bug report for h1_mimic.py

[song-siqi]

See this

expressive-humanoid/legged_gym/legged_gym/envs/h1/h1_mimic.py

Line 427 in aa14b93

def compute_obs_demo(self):

where self._in_place_flag is a bool tensor whose value is only between 0 and 1.
I launched play.py only to find that envs 0 is doing in-place motions.
After I commented obs_demo[self._in_place_flag, self._n_demo_dof:self._n_demo_dof+3] = 0 then it works.