ci(deps): bump docker/build-push-action from 6.4.0 to 6.4.1 (#373)

Bumps
[docker/build-push-action](https://github.com/docker/build-push-action)
from 6.4.0 to 6.4.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/docker/build-push-action/releases">docker/build-push-action's
releases</a>.</em></p>
<blockquote>
<h2>v6.4.1</h2>
<ul>
<li>revert &quot;Set <code>repository</code> and <code>ghtoken</code>
attributes for <a
href="https://docs.docker.com/build/cache/backends/gha/#avoid-github-actions-cache-api-throttling">GitHub
Actions cache backend</a>&quot; by <a
href="https://github.com/crazy-max"><code>@​crazy-max</code></a> in <a
href="https://redirect.github.com/docker/build-push-action/pull/1183">docker/build-push-action#1183</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/docker/build-push-action/compare/v6.4.0...v6.4.1">https://github.com/docker/build-push-action/compare/v6.4.0...v6.4.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/docker/build-push-action/commit/1ca370b3a9802c92e886402e0dd88098a2533b12"><code>1ca370b</code></a>
Merge pull request <a
href="https://redirect.github.com/docker/build-push-action/issues/1183">#1183</a>
from crazy-max/revert-gha-cache-to</li>
<li><a
href="https://github.com/docker/build-push-action/commit/2c95ebed5c303261a63c148b68f4ce3023814acc"><code>2c95ebe</code></a>
chore: update generated content</li>
<li><a
href="https://github.com/docker/build-push-action/commit/d189d0ef33a3269ad4a3c50511f63fb7b6d63809"><code>d189d0e</code></a>
Revert &quot;set repository and ghtoken attributes for gha cache
type&quot;</li>
<li>See full diff in <a
href="https://github.com/docker/build-push-action/compare/a254f8ca60a858f3136a2f1f23a60969f2c402dd...1ca370b3a9802c92e886402e0dd88098a2533b12">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/rootfs.yaml

@@ -44,7 +44,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@4fd812986e6c8c2a69e18311145f9371337f27d4 # v3.4.0
       - name: Build Image
-        uses: docker/build-push-action@a254f8ca60a858f3136a2f1f23a60969f2c402dd # v6.4.0
+        uses: docker/build-push-action@1ca370b3a9802c92e886402e0dd88098a2533b12 # v6.4.1
         with:
           platforms: linux/${{ matrix.arch }}
           push: false