Update actions/setup-node action to v4 (#89)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-node](https://togithub.com/actions/setup-node) | action
| major | `v3` -> `v4` |

---

### Release Notes

<details>
<summary>actions/setup-node (actions/setup-node)</summary>

### [`v4`](https://togithub.com/actions/setup-node/compare/v3...v4)

[Compare
Source](https://togithub.com/actions/setup-node/compare/v3...v4)

</details>

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.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       with:
         version: 8
     - name: Install Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
         node-version: 20
         cache: 'pnpm'