Update section header for Legal Notice in README

[weinong]

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.25%. Comparing base (4505642) to head (cac9242).

❗ There is a different number of reports uploaded between BASE (4505642) and HEAD (cac9242). Click for more details.

HEAD has 4 uploads less than BASE

Flag	BASE (4505642)	HEAD (cac9242)
integration	1	0
slow-browser	1	0
ollama_local	1	0
slow-other	1	0

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #139      +/-   ##
==========================================
- Coverage   64.38%   58.25%   -6.13%     
==========================================
  Files          33       33              
  Lines        2333     2333              
==========================================
- Hits         1502     1359     -143     
- Misses        831      974     +143     

Flag	Coverage Δ
integration	?
ollama_local	?
slow-browser	?
slow-other	?
unit	58.25% <ø> (-0.22%)	⬇️

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see 10 files with indirect coverage changes

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