lint: fix ruff linting in tox

[lengau]

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• Have you successfully run tox?

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[codecov]

Codecov Report

Merging #67 (c322b37) into main (09032a8) will not change coverage.
The diff coverage is 90.90%.

@@           Coverage Diff           @@
##             main      #67   +/-   ##
=======================================
  Coverage   88.07%   88.07%           
=======================================
  Files          13       13           
  Lines         629      629           
  Branches      125      125           
=======================================
  Hits          554      554           
  Misses         61       61           
  Partials       14       14           

Impacted Files	Coverage Δ
craft_archives/repo/package_repository.py	98.75% <90.90%> (ø)