test: bump @aws/mynah-ui to 4.39.2-beta.1 for keyup fix validation

[aseemxs]

Problem

Solution

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.56%. Comparing base (4ff5ab0) to head (165a7a9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2678      +/-   ##
==========================================
+ Coverage   60.49%   60.56%   +0.07%     
==========================================
  Files         279      279              
  Lines       66263    66263              
  Branches     4251     4258       +7     
==========================================
+ Hits        40086    40134      +48     
+ Misses      26092    26044      -48     
  Partials       85       85              

Flag	Coverage Δ
unittests	60.53% <ø> (+0.03%)	⬆️

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