Update Rust crate memchr to v2.8.0 (#18047)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [memchr](https://redirect.github.com/BurntSushi/memchr) |
workspace.dependencies | minor | `2.7.6` → `2.8.0` |

---

### Release Notes

<details>
<summary>BurntSushi/memchr (memchr)</summary>

###
[`v2.8.0`](https://redirect.github.com/BurntSushi/memchr/compare/2.7.6...2.8.0)

[Compare
Source](https://redirect.github.com/BurntSushi/memchr/compare/2.7.6...2.8.0)

</details>

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Cargo.lock

@@ -2631,9 +2631,9 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.7.6"
+version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+checksum = "f8ca58f447f06ed17d5fc4043ce1b10dd205e060fb3ce5b979b8ed8e59ff3f79"
 
 [[package]]
 name = "memmap2"