Update actions/cache action to v4.1.2 (#349)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/cache](https://redirect.github.com/actions/cache) | action | patch | `v4.1.1` -> `v4.1.2` |

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### Release Notes

<details>
<summary>actions/cache (actions/cache)</summary>

### [`v4.1.2`](https://redirect.github.com/actions/cache/compare/v4.1.1...v4.1.2)

[Compare Source](https://redirect.github.com/actions/cache/compare/v4.1.1...v4.1.2)

</details>

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### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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.github/workflows/rust.yml

@@ -18,7 +18,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Cache
-      uses: actions/[email protected].1
+      uses: actions/[email protected].2
       with:
         path: target/
         key: target