chore: fix typo in stacksjs-helper-generator.ts

[moodmosaic]

No description provided.

[lgalabru]

thanks @moodmosaic!

[codecov-commenter]

Codecov Report

Merging #283 (b285826) into develop (5785a6e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop    #283   +/-   ##
=======================================
  Coverage     1.30%   1.30%           
=======================================
  Files           32      32           
  Lines         7510    7510           
=======================================
  Hits            98      98           
  Misses        7412    7412           

Flag	Coverage Δ
unittests	1.30% <ø> (ø)

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