chore(deps): update actions/checkout action to v5 (#350)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://redirect.github.com/actions/checkout) |
action | major | `v4` -> `v5` |

---

### Release Notes

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

### [`v5`](https://redirect.github.com/actions/checkout/compare/v4...v5)

[Compare
Source](https://redirect.github.com/actions/checkout/compare/v4...v5)

</details>

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

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

---

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

---

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Author: NyuwBot

.github/workflows/continuous-integration.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Add problem matcher
         run: echo "::add-matcher::.github/problemMatchers/eslint.json"
       - name: Use Node.js v19.5.0
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Project
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Add problem matcher
         run: echo "::add-matcher::.github/problemMatchers/tsc.json"
       - name: Use Node.js v19.5.0