Upgrade docusaurus version to 3.8.1

[saitcakmak]

Test Plan:
Local build

[facebook-github-bot]

@saitcakmak has imported this pull request. If you are a Meta employee, you can view this in D79662729.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (48dd731) to head (476b965).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #2955   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          216       216           
  Lines        20219     20219           
=========================================
  Hits         20219     20219           

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[facebook-github-bot]

@saitcakmak has imported this pull request. If you are a Meta employee, you can view this in D79662729.

[facebook-github-bot]

@saitcakmak merged this pull request in cf9a769.