chore(deps): update dependency flake8 to v7

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
flake8 (changelog)	^6.0.0 → ^7.0.0

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Release Notes

pycqa/flake8 (flake8)

v7.4.1

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v7.4.0

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v7.3.0

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v7.2.0

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v7.1.2

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v7.1.1

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v7.1.0

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v7.0.0

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Configuration

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: poetry.lock

The Poetry configuration is invalid:
  - Additional properties are not allowed ('package-mode' was unexpected)