Bump docker/setup-buildx-action from 2.9.0 to 2.9.1 (#176)

Bumps
[docker/setup-buildx-action](https://github.com/docker/setup-buildx-action)
from 2.9.0 to 2.9.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/docker/setup-buildx-action/releases">docker/setup-buildx-action's
releases</a>.</em></p>
<blockquote>
<h2>v2.9.1</h2>
<ul>
<li>Bump <code>@​docker/actions-toolkit</code> from 0.7.0 to 0.7.1 in <a
href="https://redirect.github.com/docker/setup-buildx-action/pull/248">docker/setup-buildx-action#248</a>
<ul>
<li>Fixes an issue where building Buildx does not match the local
platform (<a
href="https://redirect.github.com/docker/actions-toolkit/pull/135">docker/actions-toolkit#135</a>)</li>
</ul>
</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/docker/setup-buildx-action/compare/v2.9.0...v2.9.1">https://github.com/docker/setup-buildx-action/compare/v2.9.0...v2.9.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/docker/setup-buildx-action/commit/4c0219f9ac95b02789c1075625400b2acbff50b1"><code>4c0219f</code></a>
Merge pull request <a
href="https://redirect.github.com/docker/setup-buildx-action/issues/248">#248</a>
from docker/dependabot/npm_and_yarn/docker/actions-to...</li>
<li><a
href="https://github.com/docker/setup-buildx-action/commit/0db41bf51b6a5e4f625cb076b9a8f6a83eb9f083"><code>0db41bf</code></a>
update generated content</li>
<li><a
href="https://github.com/docker/setup-buildx-action/commit/62fc1a1dd60cc8c6dc06900614f9bf2175bf7003"><code>62fc1a1</code></a>
Bump <code>@​docker/actions-toolkit</code> from 0.7.0 to 0.7.1</li>
<li>See full diff in <a
href="https://github.com/docker/setup-buildx-action/compare/2a1a44ac4aa01993040736bd95bb470da1a38365...4c0219f9ac95b02789c1075625400b2acbff50b1">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/docker.yaml

@@ -45,7 +45,7 @@ jobs:
 
       # Workaround: https://github.com/docker/build-push-action/issues/461
       - name: Setup Docker buildx
-        uses: docker/setup-buildx-action@2a1a44ac4aa01993040736bd95bb470da1a38365
+        uses: docker/setup-buildx-action@4c0219f9ac95b02789c1075625400b2acbff50b1
 
       # Login against a Docker registry except on PR
       # https://github.com/docker/login-action