ci: pre-commit autoupdate

[pre-commit-ci[bot]]

updates:

• github.com/adamchainz/django-upgrade: 1.8.0 → 1.9.0

[codecov[bot]]

Codecov Report

Merging #50 (89e026d) into master (d2e4daa) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #50   +/-   ##
=======================================
  Coverage   86.60%   86.60%           
=======================================
  Files         110      110           
  Lines        2920     2920           
  Branches      565      565           
=======================================
  Hits         2529     2529           
  Misses        294      294           
  Partials       97       97           

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