build(deps): bump pnpm/action-setup from 5 to 6 in the github-actions group (#957)

Bumps the github-actions group with 1 update:
[pnpm/action-setup](https://github.com/pnpm/action-setup).

Updates `pnpm/action-setup` from 5 to 6
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/pnpm/action-setup/releases">pnpm/action-setup's
releases</a>.</em></p>
<blockquote>
<h2>v6.0.0</h2>
<p>Added support for pnpm <a
href="https://github.com/pnpm/pnpm/releases/tag/v11.0.0-rc.0">v11</a>.</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/pnpm/action-setup/commit/08c4be7e2e672a47d11bd04269e27e5f3e8529cb"><code>08c4be7</code></a>
docs(README): update action-setup version</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/579891461a117d7c030d0430bbc772562374d9e1"><code>5798914</code></a>
chore: update .gitignore</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/ddffd667542d33325b6f1d9bda9cfcc7861fc400"><code>ddffd66</code></a>
fix: remove accidentally committed file</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/b43f991918ce53332dce4c15c32ae14261d12d65"><code>b43f991</code></a>
fix: update pnpm to 11.0.0-rc.0</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/3852509c9e55070b5aac70d0500b8772d13ed4e6"><code>3852509</code></a>
README.md: bring versions up-to-date (<a
href="https://redirect.github.com/pnpm/action-setup/issues/222">#222</a>)</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/6e7bdbda5fe05107efc88b23b7ed00aa05f84ca0"><code>6e7bdbd</code></a>
chore: bump bootstrap pnpm to 11.0.0-beta.4-1 and add update script</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/6b87c4621a21f802115d27ffcbfb44e28abd1387"><code>6b87c46</code></a>
fix: Windows standalone mode — bypass broken npm shims (<a
href="https://redirect.github.com/pnpm/action-setup/issues/217">#217</a>)</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/994d756a33d64d79175a2d721a1a1b6976958b2d"><code>994d756</code></a>
feat: read pnpm version from devEngines.packageManager (<a
href="https://redirect.github.com/pnpm/action-setup/issues/211">#211</a>)</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/738f428026a1f5a72398de22aeed83d859c4a660"><code>738f428</code></a>
docs: upgrade pnpm/action-setup from v4 to v5</li>
<li><a
href="https://github.com/pnpm/action-setup/commit/62bce642757454630341df504b8b9ee51f1332da"><code>62bce64</code></a>
fix: extract pnpm version from packageManager field instead of returning
unde...</li>
<li>Additional commits viewable in <a
href="https://github.com/pnpm/action-setup/compare/v5...v6">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/ci.yml

@@ -55,7 +55,7 @@ jobs:
           bundler-cache: true
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v5
+        uses: pnpm/action-setup@v6
         with:
           cache: true
           cache_dependency_path: frontend/pnpm-lock.yaml
@@ -85,7 +85,7 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v5
+        uses: pnpm/action-setup@v6
         with:
           cache: true
           cache_dependency_path: frontend/pnpm-lock.yaml
@@ -189,7 +189,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup pnpm
-        uses: pnpm/action-setup@v5
+        uses: pnpm/action-setup@v6
         with:
           cache: true
           cache_dependency_path: frontend/pnpm-lock.yaml