chore(dependencies): update dependency motor to v3.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
motor	==3.3.2 -> ==3.4.0

---

Release Notes

mongodb/motor (motor)

### [`v3.4.0`](https://togithub.com/mongodb/motor/releases/tag/3.4.0): Motor 3.4.0 [Compare Source](https://togithub.com/mongodb/motor/compare/3.3.2...3.4.0) Community post: https://www.mongodb.com/community/forums/t/motor-3-4-0-release/272987

---

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