fix(deps): update rust crate serde to v1.0.209

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
serde (source)	dependencies	patch	1.0.208 -> 1.0.209

---

Release Notes

serde-rs/serde (serde)

### [`v1.0.209`](https://togithub.com/serde-rs/serde/releases/tag/v1.0.209) [Compare Source](https://togithub.com/serde-rs/serde/compare/v1.0.208...v1.0.209) - Fix deserialization of empty structs and empty tuples inside of untagged enums ([#​2805](https://togithub.com/serde-rs/serde/issues/2805), thanks [@​Mingun](https://togithub.com/Mingun))

---

Configuration

📅 Schedule: Branch creation - "before 5:00am" in timezone America/Chicago, 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 was generated by Mend Renovate. View the repository job log.