Fix to not duplicate arg labels on constrained sketches

[jtran]

Fixes #6336.

[vercel]

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Name	Status	Preview	Updated (UTC)
modeling-app	✅ Ready (Inspect)	Visit Preview	Apr 17, 2025 6:17am

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.03%. Comparing base (3324835) to head (d52800b).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6337   +/-   ##
=======================================
  Coverage   85.03%   85.03%           
=======================================
  Files         108      108           
  Lines       46145    46145           
=======================================
  Hits        39241    39241           
  Misses       6904     6904           

Flag	Coverage Δ
rust	85.03% <ø> (ø)

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