Use working isort version in pre-commit example

[iainelder]

pre-commit fails to initialize an environment for rev 5.6.4 with some weird error about Poetry.

$ pre-commit run --all-files
...
          RuntimeError: The Poetry configuration is invalid:
            - tool.poetry.extras.pipfile_deprecated_finder[2] must match pattern ^[a-zA-Z-_.0-9]+$

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.16%. Comparing base (9a400ae) to head (4950ded).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2402   +/-   ##
=======================================
  Coverage   99.16%   99.16%           
=======================================
  Files          40       40           
  Lines        3101     3101           
  Branches      680      680           
=======================================
  Hits         3075     3075           
  Misses         15       15           
  Partials       11       11           

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