Update requirements.txt to bump up econml to 0.13.0

[gaugup]

Description

Update requirements.txt to bump up econml to 0.13.0

Checklist

• I have added screenshots above for all UI changes.
• I have added e2e tests for all UI changes.
• Documentation was updated if it was needed.

[codecov-commenter]

Codecov Report

Merging #1499 (20d59f6) into main (bcd90dd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1499   +/-   ##
=======================================
  Coverage   87.56%   87.56%           
=======================================
  Files         108      108           
  Lines        5081     5081           
=======================================
  Hits         4449     4449           
  Misses        632      632           

Flag	Coverage Δ
unittests	87.56% <ø> (ø)

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[github-actions]

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[github-actions]

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[github-actions]

https://responsibleai.blob.core.windows.net/pullrequest/microsoft/responsible-ai-toolbox/gaugup/UpdateEconml/dashboard/index.html