fix: list commits of type docs for python

[busunkim96]

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• Python: Add commits of type docs to the changelog #459
• Ensure the tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> 🦕

[codecov]

Codecov Report

Merging #460 into master will increase coverage by 0.03%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##           master     #460      +/-   ##
==========================================
+ Coverage   79.71%   79.74%   +0.03%     
==========================================
  Files          40       40              
  Lines        4628     4640      +12     
  Branches      374      374              
==========================================
+ Hits         3689     3700      +11     
- Misses        938      939       +1     
  Partials        1        1              

Impacted Files	Coverage Δ
src/releasers/python.ts	38.46% <91.66%> (+6.08%)	⬆️

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[bcoe]

@busunkim96 I guess I should read PRs before issues 😆