Fix python classification example

[molntamas]

Argument was missing from the classifier function

Related Issue

None

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Checklist

• [X ] I have read the CONTRIBUTING guidelines.
• I have added tests to cover my changes.
• [ X] I have updated the documentation (docs folder) accordingly.

Additional Notes

Only the documentation was edited.

[greptile-apps]

PR Summary

Added missing engine parameter to the classifier function example in README.md to properly demonstrate how to use the classification functionality with AsyncEmbeddingEngine.

• Fixed code example in README.md by adding required engine parameter to classifier() function signature
• Aligns documentation with actual implementation requirements for classification operations
• Improves clarity for users implementing text classification with infinity

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.54%. Comparing base (bfb66fd) to head (709ade3).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #487      +/-   ##
==========================================
+ Coverage   79.48%   79.54%   +0.05%     
==========================================
  Files          41       41              
  Lines        3422     3422              
==========================================
+ Hits         2720     2722       +2     
+ Misses        702      700       -2     

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[michaelfeil]

Thanks for the quick fix!