Bump pascalgn/automerge-action from v0.12.0 to v0.13.1

Bumps [pascalgn/automerge-action](https://github.com/pascalgn/automerge-action) from v0.12.0 to v0.13.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/pascalgn/automerge-action/releases">pascalgn/automerge-action's releases</a>.</em></p>
<blockquote>
<h2>Release 0.13.1</h2>
<p><strong>The functionality of this action is now available directly in GitHub as <a href="https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/automatically-merging-a-pull-request">auto-merge</a>.</strong> The automerge-action project will still be maintained, but users are encouraged to switch to auto-merge for simple workflows, as it offers a faster and more stable experience.</p>
<h2>Release 0.13.0</h2>
<ul>
<li>Migrate to JS action (<a href="https://github-redirect.dependabot.com/pascalgn/automerge-action/issues/135">#135</a>)</li>
<li>Update dependencies</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/pascalgn/automerge-action/commit/741c311a47881be9625932b0a0de1b0937aab1ae"><code>741c311</code></a> Update README.md</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/c0a2840354f891c0309152dbd65830a4aab2960e"><code>c0a2840</code></a> Update README.md</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/c6f2699cc4c19ea7ce7f560dbebd85565b744377"><code>c6f2699</code></a> Update README.md</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/e182668003c7d87a7c26d15ff445df88c34a0886"><code>e182668</code></a> Update dependencies</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/7e53ea33c9aad5b8d8a412af9e3ffd959e99f2cb"><code>7e53ea3</code></a> Transition to running action in JS instead of Docker (<a href="https://github-redirect.dependabot.com/pascalgn/automerge-action/issues/135">#135</a>)</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/9bcd447336bf2e720ce3c7c32b3e06c08f4329b6"><code>9bcd447</code></a> Update README.md</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/5664da29c4edb3b5c8cfd3c950c23fcac92696d0"><code>5664da2</code></a> Handle rate limit exceeded merge error (<a href="https://github-redirect.dependabot.com/pascalgn/automerge-action/issues/119">#119</a>)</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/88480459fd3771b8f4c7e68bb9b677b5e1e48f36"><code>8848045</code></a> Fix build</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/8e9074f4ee9cd9bf956075834e86fee56af96138"><code>8e9074f</code></a> Fix build</li>
<li><a href="https://github.com/pascalgn/automerge-action/commit/234debbbc46cf18bbba3f595912743abafc7d491"><code>234debb</code></a> Add CircleCI config</li>
<li>See full diff in <a href="https://github.com/pascalgn/automerge-action/compare/v0.12.0...741c311a47881be9625932b0a0de1b0937aab1ae">compare view</a></li>
</ul>
</details>
<br />


Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
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</details>

.github/workflows/automerge.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.actor == 'dependabot[bot]' || github.actor == 'dependabot-preview[bot]'
     steps:
-      - uses: pascalgn/automerge-action@v0.12.0
+      - uses: pascalgn/automerge-action@v0.13.1
         env:
           GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
           MERGE_LABELS: "dependencies"