fix(CLI): help command usage "undefined"

[TastefulElk]

The "help" command currently shows "undefined" in the usage. This PR adds a simple description that it'll just show the help that the user is currently seeing

[TastefulElk]

I marked commit as fix since I think it's technically a bug fix but let me know if you want me to change it to docs instead 👍

[codecov]

Codecov Report

Merging #10175 (056ae92) into master (7e24669) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10175   +/-   ##
=======================================
  Coverage   85.37%   85.37%           
=======================================
  Files         339      339           
  Lines       13819    13819           
=======================================
  Hits        11798    11798           
  Misses       2021     2021           

Impacted Files	Coverage Δ
lib/cli/commands-schema/no-service.js	100.00% <ø> (ø)

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[medikoo]

Thank you @TastefulElk ! Good find