chore: Update @edx/frontend-lib-learning-assistant to v2.4.1

[rijuma]

This update incorporates new experimental features for Xpert AI Assistant.

Updated Features

• Fetches chat history when loading Xpert (feat: Fetches chat history when loading Xpert edx/frontend-lib-learning-assistant#64) (bc2e7a1)
• Removed unused gpt 4 experiment code (feat: remove unused gpt 4 experiment code edx/frontend-lib-learning-assistant#61) (b89d9ec)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.25%. Comparing base (2ff8c39) to head (b0998a6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1518   +/-   ##
=======================================
  Coverage   89.25%   89.25%           
=======================================
  Files         318      318           
  Lines        5563     5563           
  Branches     1379     1376    -3     
=======================================
  Hits         4965     4965           
  Misses        582      582           
  Partials       16       16           

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