Update documentation

[floreks]

No description provided.

[maciaszczykm]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floreks, maciaszczykm

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[codecov]

Codecov Report

Merging #4793 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4793   +/-   ##
=======================================
  Coverage   45.43%   45.43%           
=======================================
  Files         214      214           
  Lines        9977     9977           
  Branches       94       94           
=======================================
  Hits         4533     4533           
  Misses       5180     5180           
  Partials      264      264

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[shu-mutou]

Closes: #4008