chore(deps): update actions/checkout action to v3 (#19)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://github.com/actions/checkout) | action | major | `v2` -> `v3` |

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### Release Notes

<details>
<summary>actions/checkout</summary>

### [`v3`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v310)

[Compare Source](https://github.com/actions/checkout/compare/v2...v3)

-   [Use @&#8203;actions/core `saveState` and `getState`](https://github.com/actions/checkout/pull/939)
-   [Add `github-server-url` input](https://github.com/actions/checkout/pull/922)

</details>

---

### 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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.github/workflows/publish-release.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.ref_name == 'main' }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Create GitHub Release
         uses: marvinpinto/action-automatic-releases@latest
         with:
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ startsWith(github.ref, 'refs/tags/v') }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Create GitHub Release
         uses: marvinpinto/action-automatic-releases@latest
         with: