Use arrays instead of vec in the documentation

[utpilla]

Changes

• Update code documentation to use array instead of vec to promote good practices and avoid unnecessary allocations

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.1%. Comparing base (3193320) to head (578622f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2042   +/-   ##
=====================================
  Coverage   77.1%   77.1%           
=====================================
  Files        123     123           
  Lines      21104   21104           
=====================================
  Hits       16276   16276           
  Misses      4828    4828           

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