Add nessai to samplers documentation

10 jobs for add-nessai-sampler in 3 minutes and 33 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Initial
passed #1219513
authors

00:00:58

passed #1219510
basic-3.7

00:01:29

passed #1219512
containers

00:00:10

failed #1219511
docs

00:03:33

passed #1219514
precommits-py3.7

00:01:29

 
  Test
skipped #1219517
python-3.6
skipped #1219519
python-3.6-samplers
skipped #1219515
python-3.7
skipped #1219518
python-3.7-samplers
skipped #1219516
python-3.8
 
Name Stage Failure
failed
docs Initial
--> 103                 name='luminosity_distance', latex_label='$d_L$', unit=units.Mpc),
104 comoving_distance=dict(
105 name='comoving_distance', latex_label='$d_C$', unit=units.Mpc))

NameError: name 'units' is not defined
NameError: name 'units' is not defined

Cleaning up file based variables
ERROR: Job failed: exit code 1