Update JasonEtco/is-sponsor-label-action action to v2 (#16)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [JasonEtco/is-sponsor-label-action](https://github.com/JasonEtco/is-sponsor-label-action) | action | major | `v1` → `v2` |

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### Release Notes

<details>
<summary>JasonEtco/is-sponsor-label-action (JasonEtco/is-sponsor-label-action)</summary>

### [`v2`](https://github.com/JasonEtco/is-sponsor-label-action/compare/v1...v2)

[Compare Source](https://github.com/JasonEtco/is-sponsor-label-action/compare/v1...v2)

</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.

---

 - [ ] <!-- 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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Reviewed-on: #16
Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk>
Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

.archive/.github/workflows/sponsors.yml

@@ -9,6 +9,6 @@ jobs:
     name: is-sponsor-label
     runs-on: ubuntu-latest
     steps:
-      - uses: JasonEtco/is-sponsor-label-action@v1
+      - uses: JasonEtco/is-sponsor-label-action@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}