Update Rust crate heed to v0.20.5 (#16464)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [heed](https://togithub.com/Kerollmops/heed) | workspace.dependencies
| patch | `0.20.4` -> `0.20.5` |

---

### Release Notes

<details>
<summary>Kerollmops/heed (heed)</summary>

###
[`v0.20.5`](https://togithub.com/meilisearch/heed/releases/tag/v0.20.5):
🛁

[Compare
Source](https://togithub.com/Kerollmops/heed/compare/v0.20.4...v0.20.5)

<p align="center"><img width="280px"
src="https://raw.githubusercontent.com/meilisearch/heed/main/assets/heed-pigeon-logo.png"></a></p>
<h1 align="center" >heed</h1>

##### What's Changed
* fix function docs (clippy warnings) by
@&#8203;antonil[https://github.com/meilisearch/heed/pull/273](https://togithub.com/meilisearch/heed/pull/273)ll/273
* fix custom_key_cmp_wrapper being able to unwind to C code (ub) by
@&#8203;antonil[https://github.com/meilisearch/heed/pull/275](https://togithub.com/meilisearch/heed/pull/275)ll/275

##### New Contributors
* @&#8203;antonilol made their first
contributi[https://github.com/meilisearch/heed/pull/273](https://togithub.com/meilisearch/heed/pull/273)ll/273

</details>

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Release Notes:

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