Bumps
[sigstore/gh-action-sigstore-python](https://github.com/sigstore/gh-action-sigstore-python)
from 3.3.0 to 3.4.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/sigstore/gh-action-sigstore-python/releases">sigstore/gh-action-sigstore-python's
releases</a>.</em></p>
<blockquote>
<h2>v3.4.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Used <a
href="https://github.com/sigstore/sigstore-python">sigstore</a> package
version is now 4.3.0</li>
<li>Other dependency updates</li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/sigstore/gh-action-sigstore-python/compare/v3.3.0...v3.4.0">https://github.com/sigstore/gh-action-sigstore-python/compare/v3.3.0...v3.4.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/5b79a39c381910c090341a2c9b0bf022c8b387e1"><code>5b79a39</code></a>
build(deps): bump sigstore in the python-dependencies group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/408">#408</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/3d7f17b8b279a1d7ab50eb95c5093a705faa268c"><code>3d7f17b</code></a>
build(deps): bump idna in the python-dependencies group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/407">#407</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/2d128b7818557646bcbf10cbacdb1e853bb219f2"><code>2d128b7</code></a>
build(deps): bump github/codeql-action in the actions group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/405">#405</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/06882d3fcb29bb3d179477463294949a66a585a3"><code>06882d3</code></a>
build(deps): bump the python-dependencies group with 3 updates (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/406">#406</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/bab6f774fe0bae9a78bb84a7f2dae7eba8c3acb6"><code>bab6f77</code></a>
build(deps): bump the actions group across 1 directory with 3 updates
(<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/403">#403</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/f98c4297018863c6a9e0c5b805a3556b077e71f4"><code>f98c429</code></a>
build(deps): bump securesystemslib in the python-dependencies group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/404">#404</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/db9196e5f4691f5b56529ff81e2ebee29602e955"><code>db9196e</code></a>
build(deps): bump the python-dependencies group across 1 directory with
3 upd...</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/839093df29c9a230f2937675f228721adea13c41"><code>839093d</code></a>
build(deps): bump certifi from 2026.4.22 to 2026.5.20 in the
python-dependenc...</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/d9df9da0e2490b27cf8083a92277335284adb83f"><code>d9df9da</code></a>
build(deps): bump ast-serialize in the python-dependencies group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/397">#397</a>)</li>
<li><a
href="https://github.com/sigstore/gh-action-sigstore-python/commit/2f7a761af4c98ffb7ae55fa917de2cc414a9b681"><code>2f7a761</code></a>
build(deps): bump github/codeql-action in the actions group (<a
href="https://redirect.github.com/sigstore/gh-action-sigstore-python/issues/395">#395</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/sigstore/gh-action-sigstore-python/compare/v3.3.0...v3.4.0">compare
view</a></li>
</ul>
</details>
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