Update dependency bufferutil to v4.0.8

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
bufferutil	4.0.6 -> 4.0.8

---

Release Notes

websockets/bufferutil (bufferutil)

### [`v4.0.8`](https://redirect.github.com/websockets/bufferutil/compare/v4.0.7...v4.0.8) [Compare Source](https://redirect.github.com/websockets/bufferutil/compare/v4.0.7...v4.0.8) ### [`v4.0.7`](https://redirect.github.com/websockets/bufferutil/compare/v4.0.6...v4.0.7) [Compare Source](https://redirect.github.com/websockets/bufferutil/compare/v4.0.6...v4.0.7)

---

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.

---

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

---

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