Update dependency flake8 to v7

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
flake8 (changelog)	6.1.0 -> 7.1.1
flake8 (changelog)	==6.1.0 -> ==7.1.1

---

Release Notes

pycqa/flake8 (flake8)

### [`v7.1.1`](https://redirect.github.com/pycqa/flake8/compare/7.1.0...7.1.1) [Compare Source](https://redirect.github.com/pycqa/flake8/compare/7.1.0...7.1.1) ### [`v7.1.0`](https://redirect.github.com/pycqa/flake8/compare/7.0.0...7.1.0) [Compare Source](https://redirect.github.com/pycqa/flake8/compare/7.0.0...7.1.0) ### [`v7.0.0`](https://redirect.github.com/pycqa/flake8/compare/6.1.0...7.0.0) [Compare Source](https://redirect.github.com/pycqa/flake8/compare/6.1.0...7.0.0)

---

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 is behind base branch, or you tick the rebase/retry checkbox.

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

---

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

---

This PR was generated by Mend Renovate. View the repository job log.