Fix check_outliers ics which test on R devel

[rempsyc]

Test check_outliers ics which on R devel re #607

[codecov]

Codecov Report

Merging #608 (484c82f) into main (52a9b9e) will increase coverage by 0.54%.
Report is 1 commits behind head on main.
The diff coverage is 78.57%.

❗ Current head 484c82f differs from pull request most recent head 8df9ad9. Consider uploading reports for the commit 8df9ad9 to get more accurate results

@@            Coverage Diff             @@
##             main     #608      +/-   ##
==========================================
+ Coverage   51.26%   51.81%   +0.54%     
==========================================
  Files          84       84              
  Lines        5768     5773       +5     
==========================================
+ Hits         2957     2991      +34     
+ Misses       2811     2782      -29     

Files Changed	Coverage Δ
R/check_outliers.R	86.06% <78.57%> (+3.62%)	⬆️

[strengejacke]

LGTM, thanks!