Update Yarn to v4.3.1 (#2)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [yarn](https://github.com/yarnpkg/berry) ([source](https://github.com/yarnpkg/berry/tree/HEAD/packages/yarnpkg-cli)) | packageManager | minor | [`4.1.1` -> `4.3.1`](https://renovatebot.com/diffs/npm/yarn/4.1.1/4.3.1) |

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### Release Notes

<details>
<summary>yarnpkg/berry (yarn)</summary>

### [`v4.3.1`](b2eb9dce08...2e73cdb7e2)

[Compare Source](b2eb9dce08...2e73cdb7e2)

### [`v4.3.0`](effc932614...b2eb9dce08)

[Compare Source](effc932614...b2eb9dce08)

### [`v4.2.2`](bf24f592eb...effc932614)

[Compare Source](bf24f592eb...effc932614)

### [`v4.2.1`](9a853e35cf...bf24f592eb)

[Compare Source](9a853e35cf...bf24f592eb)

### [`v4.2.0`](6b7621f073...9a853e35cf)

[Compare Source](6b7621f073...9a853e35cf)

</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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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Co-authored-by: Renovate Bot <renovate-bot@gitea.com>
Reviewed-on: #2

package.json

@@ -1,6 +1,6 @@
 {
   "name": "devsite",
-  "packageManager": "yarn@4.1.1",
+  "packageManager": "yarn@4.3.1",
   "dependencies": {
     "@11ty/eleventy": "^2.0.1"
   },