Update Rust crate assert_cmd to v2.0.16

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
assert_cmd	dev-dependencies	patch	2.0.15 -> 2.0.16

---

Release Notes

assert-rs/assert_cmd (assert_cmd)

### [`v2.0.16`](https://togithub.com/assert-rs/assert_cmd/blob/HEAD/CHANGELOG.md#2016---2024-08-09) [Compare Source](https://togithub.com/assert-rs/assert_cmd/compare/v2.0.15...v2.0.16) ##### Features - Add getters to `Command` to mirror those added to the standard library

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), 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.