Update Rust crate config to 0.15.13 (#2455)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [config](https://redirect.github.com/rust-cli/config-rs) |
workspace.dependencies | patch | `0.15.12` -> `0.15.13` |

---

### Release Notes

<details>
<summary>rust-cli/config-rs (config)</summary>

###
[`v0.15.13`](https://redirect.github.com/rust-cli/config-rs/blob/HEAD/CHANGELOG.md#01513---2025-07-09)

[Compare
Source](https://redirect.github.com/rust-cli/config-rs/compare/v0.15.12...v0.15.13)

##### Fixes

- Skip UTF-8 BOMs when reading files

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "after 8pm,before 6am" in timezone
America/Los_Angeles, Automerge - "after 8pm,before 6am" in timezone
America/Los_Angeles.

🚦 **Automerge**: Enabled.

♻ **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 this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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Author: nextest-bot

Cargo.lock

@@ -40,7 +40,7 @@ cfg-if = "1.0.1"
 color-eyre = "0.6.5"
 # config's "preserve_order" feature is needed for preserving the order of
 # setup scripts in .config/nextest.toml.
-config = { version = "0.15.12", default-features = false, features = [
+config = { version = "0.15.13", default-features = false, features = [
     "toml",
     "preserve_order",
 ] }