Add () missing from nonportable_path_linter() example

[MichaelChirico]

Uncaught error from #2288. Not being able to rely completely on GHA let this slip through.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (08d7396) 99.64% compared to head (22fe5e4) 99.64%.

❗ Current head 22fe5e4 differs from pull request most recent head abbc68b. Consider uploading reports for the commit abbc68b to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2291   +/-   ##
=======================================
  Coverage   99.64%   99.64%           
=======================================
  Files         115      115           
  Lines        5284     5284           
=======================================
  Hits         5265     5265           
  Misses         19       19           

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[AshesITR]

document()