Update Rust crate heed to v0.20.4 (#16250)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [heed](https://togithub.com/Kerollmops/heed) | workspace.dependencies
| patch | `0.20.3` -> `0.20.4` |

---

### Release Notes

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

###
[`v0.20.4`](https://togithub.com/meilisearch/heed/releases/tag/v0.20.4):
🛁

[Compare
Source](https://togithub.com/Kerollmops/heed/compare/v0.20.3...v0.20.4)

<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
* Use features that actually exists by
@&#8203;Kerollmo[https://github.com/meilisearch/heed/pull/270](https://togithub.com/meilisearch/heed/pull/270)ll/270
* Bump lmdb submodules commit by
@&#8203;zanavis[https://github.com/meilisearch/heed/pull/269](https://togithub.com/meilisearch/heed/pull/269)ll/269

##### New Contributors
* @&#8203;zanaviska made their first
contributi[https://github.com/meilisearch/heed/pull/269](https://togithub.com/meilisearch/heed/pull/269)ll/269

</details>

---

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---

Release Notes:

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Cargo.lock

@@ -5033,9 +5033,9 @@ checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
 [[package]]
 name = "heed"
-version = "0.20.3"
+version = "0.20.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2bc30da4a93ff8cb98e535d595d6de42731d4719d707bc1c86f579158751a24e"
+checksum = "620033c8c8edfd2f53e6f99a30565eb56a33b42c468e3ad80e21d85fb93bafb0"
 dependencies = [
  "bitflags 2.6.0",
  "byteorder",
@@ -6290,9 +6290,9 @@ dependencies = [
 
 [[package]]
 name = "lmdb-master-sys"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "57640c190703d5ccf4a86aff4aeb749b2d287a8cb1723c76b51f39d77ab53b24"
+checksum = "1de7e761853c15ca72821d9f928d7bb123ef4c05377c4e7ab69fa1c742f91d24"
 dependencies = [
  "cc",
  "doxygen-rs",