Fix error message in caclient_test

[matrixik]

Found it by accident.

[codecov[bot]]

Codecov Report

Merging #190 (a8c65b0) into main (3be4ed2) will decrease coverage by 0.00%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #190      +/-   ##
==========================================
- Coverage   76.07%   76.06%   -0.01%     
==========================================
  Files         193      193              
  Lines       14058    14058              
==========================================
- Hits        10694    10693       -1     
- Misses       2394     2395       +1     
  Partials      970      970              

Impacted Files	Coverage Δ
...g/util/concurrent/rollingcounter/rollingcounter.go	84.21% <0.00%> (-5.27%)	:arrow_down:

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[stale[bot]]

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