fix filter kernels bench

[ritchie46]

Likely an unlucky keystroke

[codecov]

Codecov Report

Merging #440 (295ad8a) into main (688e979) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #440   +/-   ##
=======================================
  Coverage   80.77%   80.77%           
=======================================
  Files         372      372           
  Lines       22637    22637           
=======================================
  Hits        18286    18286           
  Misses       4351     4351           

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