Added moment for geometric distribution along with test for issue #5078

[sagartomar]

Thank your for opening a PR!

Depending on what your PR does, here are a few things you might want to address in the description:

• what are the (breaking) changes that this PR makes?
• important background, or details about the implementation
• are the changes—especially new features—covered by tests and docstrings?
• linting/style checks have been run
• consider adding/updating relevant example notebooks
• right before it's ready to merge, mention the PR in the RELEASE-NOTES.md

[ricardoV94]

It seems like you picked some commits that are not part of your PR. You will probably need to rebase to fix it.

[codecov]

Codecov Report

Merging #5158 (1f20dd8) into main (35f9966) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5158      +/-   ##
==========================================
+ Coverage   78.05%   78.07%   +0.02%     
==========================================
  Files          88       88              
  Lines       14138    14142       +4     
==========================================
+ Hits        11035    11042       +7     
+ Misses       3103     3100       -3     

Impacted Files	Coverage Δ
pymc/distributions/continuous.py	95.98% <100.00%> (-0.01%)	⬇️
pymc/distributions/discrete.py	99.41% <100.00%> (+<0.01%)	⬆️
pymc/backends/report.py	91.60% <0.00%> (+2.09%)	⬆️

[ricardoV94]

I rebased your PR and added a couple of unrelated commits that I had in the backlog.

[ricardoV94]

Thanks @sagartomar just merged the PR! Looking forward to your next one :)

[sagartomar]

Thanks @ricardoV94