Update Rust crate ordermap to v0.5.12 (#20502)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [ordermap](https://redirect.github.com/indexmap-rs/ordermap) |
workspace.dependencies | patch | `0.5.10` -> `0.5.12` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>indexmap-rs/ordermap (ordermap)</summary>

###
[`v0.5.12`](https://redirect.github.com/indexmap-rs/ordermap/blob/HEAD/RELEASES.md#0512-2025-09-15)

[Compare
Source](https://redirect.github.com/indexmap-rs/ordermap/compare/0.5.11...0.5.12)

- Make the minimum `serde` version only apply when "serde" is enabled.

###
[`v0.5.11`](https://redirect.github.com/indexmap-rs/ordermap/blob/HEAD/RELEASES.md#0511-2025-09-15)

[Compare
Source](https://redirect.github.com/indexmap-rs/ordermap/compare/0.5.10...0.5.11)

- Switched the "serde" feature to depend on `serde_core`, improving
build
parallelism in cases where other dependents have enabled "serde/derive".

</details>

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Cargo.lock

@@ -2143,12 +2143,13 @@ checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
 
 [[package]]
 name = "ordermap"
-version = "0.5.10"
+version = "0.5.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0dcd63f1ae4b091e314a26627c467dd8810d674ba798abc0e566679955776c63"
+checksum = "b100f7dd605611822d30e182214d3c02fdefce2d801d23993f6b6ba6ca1392af"
 dependencies = [
  "indexmap",
  "serde",
+ "serde_core",
 ]
 
 [[package]]