Updated to bilby_pipe_create_injection_file
From https://git.ligo.org/lscsoft/bilby_pipe/-/blob/master/setup.py#L109, the name of the injection file creating utility should be updated in the documentation.
From https://git.ligo.org/lscsoft/bilby_pipe/-/blob/master/setup.py#L109, the name of the injection file creating utility should be updated in the documentation.