fix typo in shareable config section in readme

[plbstl]

Minor change that clarifies intent.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.03%. Comparing base (bb7d65b) to head (cca288b).
Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #997      +/-   ##
==========================================
+ Coverage   98.48%   99.03%   +0.54%     
==========================================
  Files         107      107              
  Lines        1650     1651       +1     
  Branches      581      581              
==========================================
+ Hits         1625     1635      +10     
+ Misses         25       16       -9     

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