Bump helm/chart-testing-action from 2.3.1 to 2.4.0 (#8907)

Bumps
[helm/chart-testing-action](https://github.com/helm/chart-testing-action)
from 2.3.1 to 2.4.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/helm/chart-testing-action/releases">helm/chart-testing-action's
releases</a>.</em></p>
<blockquote>
<h2>v2.4.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Retry artifact downloads by <a
href="https://github.com/steven-sheehy"><code>@​steven-sheehy</code></a>
in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/111">helm/chart-testing-action#111</a></li>
<li>fix example workflow by <a
href="https://github.com/CrowdSalat"><code>@​CrowdSalat</code></a> in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/115">helm/chart-testing-action#115</a></li>
<li>docs: only run chart lint if changed by <a
href="https://github.com/fty4"><code>@​fty4</code></a> in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/106">helm/chart-testing-action#106</a></li>
<li>docs: use GITHUB_OUTPUT in example workflow by <a
href="https://github.com/fty4"><code>@​fty4</code></a> in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/107">helm/chart-testing-action#107</a></li>
<li>Use cosign to verify the release and update chart-testing to v3.8.0
by <a href="https://github.com/cpanato"><code>@​cpanato</code></a> in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/116">helm/chart-testing-action#116</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/steven-sheehy"><code>@​steven-sheehy</code></a>
made their first contribution in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/111">helm/chart-testing-action#111</a></li>
<li><a
href="https://github.com/CrowdSalat"><code>@​CrowdSalat</code></a> made
their first contribution in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/115">helm/chart-testing-action#115</a></li>
<li><a href="https://github.com/fty4"><code>@​fty4</code></a> made their
first contribution in <a
href="https://redirect.github.com/helm/chart-testing-action/pull/106">helm/chart-testing-action#106</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/helm/chart-testing-action/compare/v2...v2.4.0">https://github.com/helm/chart-testing-action/compare/v2...v2.4.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="e878887317"><code>e878887</code></a>
Use cosign to verify the release and update chart-testing to v3.8.0 (<a
href="https://redirect.github.com/helm/chart-testing-action/issues/116">#116</a>)</li>
<li><a
href="68148c920a"><code>68148c9</code></a>
docs: use GITHUB_OUTPUT in example workflow (<a
href="https://redirect.github.com/helm/chart-testing-action/issues/107">#107</a>)</li>
<li><a
href="b567af86ba"><code>b567af8</code></a>
docs: only run chart lint if changed (<a
href="https://redirect.github.com/helm/chart-testing-action/issues/106">#106</a>)</li>
<li><a
href="4c22ea3887"><code>4c22ea3</code></a>
fix example workflow (<a
href="https://redirect.github.com/helm/chart-testing-action/issues/115">#115</a>)</li>
<li><a
href="a153a59efc"><code>a153a59</code></a>
Retry artifact downloads (<a
href="https://redirect.github.com/helm/chart-testing-action/issues/111">#111</a>)</li>
<li>See full diff in <a
href="https://github.com/helm/chart-testing-action/compare/v2.3.1...v2.4.0">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/helm-ci.yml

@@ -60,7 +60,7 @@ jobs:
           python-version: 3.7
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.3.1
+        uses: helm/chart-testing-action@v2.4.0
 
       - name: Run chart-testing (list-changed)
         id: list-changed