chore(deps): update dependency flake8 to v6

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
flake8 (changelog)	==5.0.4 -> ==6.0.0

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Release Notes

pycqa/flake8

### [`v6.0.0`](https://togithub.com/pycqa/flake8/compare/5.0.4...6.0.0) [Compare Source](https://togithub.com/pycqa/flake8/compare/5.0.4...6.0.0)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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[forking-renovate[bot]]

Renovate Ignore Notification

As this PR has been closed unmerged, Renovate will ignore this upgrade and you will not receive PRs for any future 6.x releases. However, if you upgrade to 6.x manually then Renovate will reenable minor and patch updates automatically.

If this PR was closed by mistake or you changed your mind, you can simply rename this PR and you will soon get a fresh replacement PR opened.