Update Rust crate bytemuck to v1.20.0 (#20947)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [bytemuck](https://redirect.github.com/Lokathor/bytemuck) |
dependencies | minor | `1.19.0` -> `1.20.0` |

---

### Release Notes

<details>
<summary>Lokathor/bytemuck (bytemuck)</summary>

###
[`v1.20.0`](https://redirect.github.com/Lokathor/bytemuck/compare/v1.19.0...v1.20.0)

[Compare
Source](https://redirect.github.com/Lokathor/bytemuck/compare/v1.19.0...v1.20.0)

</details>

---

### Configuration

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are satisfied.

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rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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---

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---

Release Notes:

- N/A

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Cargo.lock

@@ -1974,9 +1974,9 @@ dependencies = [
 
 [[package]]
 name = "bytemuck"
-version = "1.19.0"
+version = "1.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8334215b81e418a0a7bdb8ef0849474f40bb10c8b71f1c4ed315cff49f32494d"
+checksum = "8b37c88a63ffd85d15b406896cc343916d7cf57838a847b3a6f2ca5d39a5695a"
 dependencies = [
  "bytemuck_derive",
 ]