Add missing item in docstring.

[SultanOrazbayev]

    max_items: int or None
        The maximum items to keep in the cache. Default is None, which does
        not limit number of items stored in the cache.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (46e0639) 84.69% compared to head (ff68e69) 84.13%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6167      +/-   ##
==========================================
- Coverage   84.69%   84.13%   -0.56%     
==========================================
  Files         296      296              
  Lines       44184    44184              
==========================================
- Hits        37420    37175     -245     
- Misses       6764     7009     +245     

Flag	Coverage Δ
ui-tests	40.17% <ø> (-0.56%)	⬇️
unitexamples-tests	72.61% <ø> (+<0.01%)	⬆️

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