Update AutoML-NLP.md

[dhruvthakur2000]

#834

Why are these changes needed?

Related issue number

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• I've included any doc changes needed for https://microsoft.github.io/FLAML/. See https://microsoft.github.io/FLAML/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (249f0f1) 71.72% compared to head (6439ac9) 71.62%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1239      +/-   ##
==========================================
- Coverage   71.72%   71.62%   -0.10%     
==========================================
  Files          83       83              
  Lines       11249    11249              
  Branches     2360     2360              
==========================================
- Hits         8068     8057      -11     
- Misses       2726     2736      +10     
- Partials      455      456       +1     

Flag	Coverage Δ
unittests	71.49% <ø> (-0.10%)	⬇️

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