Update dependency isort to ~=6.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Confidence
isort (changelog)	~=6.0.0 -> ~=6.1.0

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Release Notes

PyCQA/isort (isort)

v6.1.0

Compare Source

• Add python 3.14 classifier and badge (#​2409) @​staticdev
  • Drop use of non-standard pkg_resources API (#​2405) @​dvarrazzo

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