build(deps): Bump cachix/install-nix-action from V28 to 29 (#928)

Bumps
[cachix/install-nix-action](https://github.com/cachix/install-nix-action)
from V28 to 29. This release includes the previously tagged commit.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/cachix/install-nix-action/releases">cachix/install-nix-action's
releases</a>.</em></p>
<blockquote>
<h2>v29</h2>
<p>Bumps Nix to 2.24.8 to fix CVE-2024-47174</p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/cachix/install-nix-action/commit/9f70348d77d0422624097c4b7a75563948901306"><code>9f70348</code></a>
Merge pull request <a
href="https://redirect.github.com/cachix/install-nix-action/issues/215">#215</a>
from Mic92/nix-bump</li>
<li><a
href="https://github.com/cachix/install-nix-action/commit/4f91dc2b65dd81b86830c57b0d3bc75eb0502a25"><code>4f91dc2</code></a>
Nix: 2.24.6 -&gt; 2.24.7</li>
<li>See full diff in <a
href="https://github.com/cachix/install-nix-action/compare/V28...v29">compare
view</a></li>
</ul>
</details>
<br />


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</details>

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Author: dependabot[bot]

.github/workflows/e2e.yml

@@ -38,7 +38,7 @@ jobs:
       # Install nix using cachix/install-nix-action if running on ARC runners
       # See: https://github.com/DeterminateSystems/nix-installer-action/issues/68
       - name: Install Nix on self-hosted ARC runners
-        uses: cachix/install-nix-action@V28
+        uses: cachix/install-nix-action@v29
         if: inputs.runs-on == 'self-hosted-ncn-dind'
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}