MNT: update vendored docs files

[DimitriPapadopoulos]

Copied from numpydoc 1.5.0.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.46 ⚠️

Comparison is base (1f6203c) 63.05% compared to head (73f7af2) 62.59%.

❗ Current head 73f7af2 differs from pull request most recent head d5e0e3f. Consider uploading reports for the commit d5e0e3f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #813      +/-   ##
==========================================
- Coverage   63.05%   62.59%   -0.46%     
==========================================
  Files          53       52       -1     
  Lines        6250     6203      -47     
  Branches      913      910       -3     
==========================================
- Hits         3941     3883      -58     
- Misses       2123     2138      +15     
+ Partials      186      182       -4     

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see 13 files with indirect coverage changes

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