Fix missing build step in publish workflow

[Mrtenz]

The execution environment wasn't built in de publish workflow, resulting in the execution bundles not being part of the NPM package.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.35%. Comparing base (e311bb5) to head (31b48ac).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2734   +/-   ##
=======================================
  Coverage   94.35%   94.35%           
=======================================
  Files         476      476           
  Lines       10137    10137           
  Branches     1542     1542           
=======================================
  Hits         9565     9565           
  Misses        572      572           

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