Update dependency rules_rust to v0.42.1 (#314)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [rules_rust](https://togithub.com/bazelbuild/rules_rust) |
http_archive | patch | `0.42.0` -> `0.42.1` |

---

### Release Notes

<details>
<summary>bazelbuild/rules_rust (rules_rust)</summary>

###
[`v0.42.1`](https://togithub.com/bazelbuild/rules_rust/releases/tag/0.42.1)

[Compare
Source](https://togithub.com/bazelbuild/rules_rust/compare/0.42.0...0.42.1)

### 0.42.1

```python
load("@&#8203;bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
http_archive(
    name = "rules_rust",
    integrity = "sha256-JLN47ZcAbx9wEr5Jiib4HduZATGLiDgK7oUi/fvotzU=",
    urls = ["https://github.com/bazelbuild/rules_rust/releases/download/0.42.1/rules_rust-v0.42.1.tar.gz"],
)
```

Additional documentation can be found at:
https://bazelbuild.github.io/rules_rust/#setup

#### What's Changed

- Fix rust module extension for Bazel pre-7.1 by
[@&#8203;cameron-martin](https://togithub.com/cameron-martin) in
[https://github.com/bazelbuild/rules_rust/pull/2612](https://togithub.com/bazelbuild/rules_rust/pull/2612)
- Test BCR example in minimum bazel by
[@&#8203;illicitonion](https://togithub.com/illicitonion) in
[https://github.com/bazelbuild/rules_rust/pull/2613](https://togithub.com/bazelbuild/rules_rust/pull/2613)
- Release 0.42.1 by
[@&#8203;UebelAndre](https://togithub.com/UebelAndre) in
[https://github.com/bazelbuild/rules_rust/pull/2614](https://togithub.com/bazelbuild/rules_rust/pull/2614)

**Full Changelog**:
bazelbuild/rules_rust@0.42.0...0.42.1

</details>

---

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---

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---

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tests/WORKSPACE

@@ -188,8 +188,8 @@ go_download_sdk(
 
 http_archive(
     name = "rules_rust",
-    sha256 = "5d3d58549e851c94d706bd6fde9c767d5dfbfce092ddd424dee97e5ef7c821ff",
-    urls = ["https://github.com/bazelbuild/rules_rust/releases/download/0.42.0/rules_rust-v0.42.0.tar.gz"],
+    sha256 = "24b378ed97006f1f7012be498a26f81ddb9901318b88380aee8522fdfbe8b735",
+    urls = ["https://github.com/bazelbuild/rules_rust/releases/download/0.42.1/rules_rust-v0.42.1.tar.gz"],
 )
 
 load("@rules_rust//rust:repositories.bzl", "rules_rust_dependencies", "rust_register_toolchains")