SIANXKE-395: Update pre-commit configuration and re-format all files

[bernhard-hagmann]

Depends on PR#3

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Please upload report for BASE (main@96491f1). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
django_generic_contact/admin.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #4   +/-   ##
=======================================
  Coverage        ?   91.37%           
=======================================
  Files           ?        7           
  Lines           ?       58           
  Branches        ?        0           
=======================================
  Hits            ?       53           
  Misses          ?        5           
  Partials        ?        0           

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