Fix documentation

[vitenti]

As PR #402 but to be merged into master.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.5%. Comparing base (d61fd06) to head (b67aa32).

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #403     +/-   ##
========================================
- Coverage    95.6%   95.5%   -0.1%     
========================================
  Files          35      34      -1     
  Lines        2621    2569     -52     
========================================
- Hits         2506    2454     -52     
  Misses        115     115             

Files	Coverage Δ
firecrown/connector/cobaya/ccl.py	100.0% <ø> (ø)
firecrown/connector/cobaya/likelihood.py	100.0% <ø> (ø)
firecrown/connector/cosmosis/likelihood.py	92.0% <ø> (ø)
firecrown/connector/mapping.py	100.0% <ø> (ø)
firecrown/connector/numcosmo/numcosmo.py	99.7% <ø> (ø)
firecrown/descriptors.py	100.0% <ø> (ø)
firecrown/likelihood/gauss_family/gauss_family.py	99.3% <ø> (ø)
firecrown/likelihood/gauss_family/gaussian.py	100.0% <ø> (ø)
...s_family/statistic/binned_cluster_number_counts.py	98.5% <ø> (ø)
...ood/gauss_family/statistic/source/number_counts.py	78.7% <ø> (ø)
... and 23 more