docs: add chainnodes to users

[koraykoska]

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b6db057) 49.17% compared to head (d5f931c) 49.17%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13754   +/-   ##
=======================================
  Coverage   49.17%   49.17%           
=======================================
  Files         248      248           
  Lines       42874    42874           
=======================================
  Hits        21083    21083           
  Misses      19689    19689           
  Partials     2102     2102           

see 1 file with indirect coverage changes

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