Fix feedback setting name for item KNN

[mdekstrand]

There was a typo in item KNN so it incorrectly saved the settings. This fixes the problem.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.37%. Comparing base (8cf227c) to head (2c49ff8).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #544   +/-   ##
=======================================
  Coverage   90.37%   90.37%           
=======================================
  Files          98       98           
  Lines        5738     5738           
=======================================
  Hits         5186     5186           
  Misses        552      552           

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