[chore] Add missing config option in confighttp documentation

[dmitryax]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.15%. Comparing base (97fcd3d) to head (7947869).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #14285   +/-   ##
=======================================
  Coverage   92.15%   92.15%           
=======================================
  Files         668      668           
  Lines       41517    41517           
=======================================
  Hits        38258    38258           
  Misses       2221     2221           
  Partials     1038     1038           

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