lal_binary_black_hole documentation should mention lal_waveform_dictionary as an option

The documentation of lal_binary_black_hole has a list of Supported arguments for kwargs: https://git.ligo.org/lscsoft/bilby/-/blob/master/bilby/gw/source.py#L48. This does not include lal_waveform_dictionary, which gets used here: https://git.ligo.org/lscsoft/bilby/-/blob/master/bilby/gw/source.py#L302.

This should be included in the documentation as this is the only way to use LALDict as an argument.