fix doc bug

[lepdou]

What's the purpose of this PR

XXXXX

Which issue(s) this PR fixes:

Fixes #

Brief changelog

XXXXX

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[codecov-commenter]

Codecov Report

Merging #4579 (b63f896) into master (22e6422) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #4579   +/-   ##
=========================================
  Coverage     47.24%   47.24%           
  Complexity     1650     1650           
=========================================
  Files           347      347           
  Lines         10631    10631           
  Branches       1053     1053           
=========================================
  Hits           5023     5023           
  Misses         5306     5306           
  Partials        302      302           

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[stale]

This pull request has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in 14 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[nobodyiam]

LGTM