docs: typo fix

[avriiil]

Fix typo in S3 backend docs

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.50%. Comparing base (66441d1) to head (a6db507).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2902      +/-   ##
==========================================
- Coverage   72.50%   72.50%   -0.01%     
==========================================
  Files         131      131              
  Lines       40421    40421              
  Branches    40421    40421              
==========================================
- Hits        29308    29306       -2     
  Misses       9238     9238              
- Partials     1875     1877       +2     

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