Update pre-commit hook pycqa/flake8 to v7

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
pycqa/flake8	repository	major	6.1.0 -> 7.0.0

Note: The pre-commit manager in Renovate is not supported by the pre-commit maintainers or community. Please do not report any problems there, instead create a Discussion in the Renovate repository if you have any questions.

---

Release Notes

pycqa/flake8 (pycqa/flake8)

### [`v7.0.0`](https://togithub.com/pycqa/flake8/compare/6.1.0...7.0.0) [Compare Source](https://togithub.com/pycqa/flake8/compare/6.1.0...7.0.0)

---

Configuration

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

🚦 Automerge: Enabled.

♻ 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.

---

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

---

This PR has been generated by Mend Renovate. View repository job log here.