update docstrings in ZeroInflatedPoisson, DiracDelta and OrderedLogistic classes

[saurbhc]

What is this PR about?
Issue #5459 - Update Docstrings for ZeroInflatedPoisson, DiracDelta and OrderedLogistic classes

Checklist

• Explain important implementation details 👆
• Make sure that the pre-commit linting/style checks pass.
• Link relevant issues (preferably in nice commit messages)
• Are the changes covered by tests and docstrings?
• Fill out the short summary sections 👇

Major / Breaking Changes

• None

Bugfixes / New features

• None

Docs / Maintenance

• Yes, as per the issue Update docstrings for better rendering on website and numpydoc compliance #5459

#DataUmbrellaPyMCSprint
cc: @reshamas
cc: @mariyayb

[codecov]

Codecov Report

Merging #5962 (aa3a073) into main (e7d0607) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5962      +/-   ##
==========================================
- Coverage   89.42%   89.41%   -0.01%     
==========================================
  Files          73       73              
  Lines       13292    13292              
==========================================
- Hits        11886    11885       -1     
- Misses       1406     1407       +1     

Impacted Files	Coverage Δ
pymc/distributions/discrete.py	99.21% <ø> (ø)
pymc/step_methods/hmc/base_hmc.py	89.76% <0.00%> (-0.79%)	⬇️

[cluhmann]

The types and spacing look good to me. You might want to include :context: close-figs just after the .. plot:: as detailed in the tutorial.

[cluhmann]

This LGTM. Just need a core dev to approve.

[aloctavodia]

LGTM

[aloctavodia]

thanks @saurbhc!