Bump DeterminateSystems/nix-installer-action from 14 to 15 (#3374)

Bumps
[DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action)
from 14 to 15.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/determinatesystems/nix-installer-action/releases">DeterminateSystems/nix-installer-action's
releases</a>.</em></p>
<blockquote>
<h2>v15</h2>
<h2>What's Changed</h2>
<ul>
<li>Grahamc/determinate argument by <a
href="https://github.com/grahamc"><code>@​grahamc</code></a> in <a
href="https://redirect.github.com/DeterminateSystems/nix-installer-action/pull/123">DeterminateSystems/nix-installer-action#123</a></li>
<li>Add the job-status option by <a
href="https://github.com/grahamc"><code>@​grahamc</code></a> in <a
href="https://redirect.github.com/DeterminateSystems/nix-installer-action/pull/125">DeterminateSystems/nix-installer-action#125</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/DeterminateSystems/nix-installer-action/compare/v14...v15">https://github.com/DeterminateSystems/nix-installer-action/compare/v14...v15</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/DeterminateSystems/nix-installer-action/commit/b92f66560d6f97d6576405a7bae901ab57e72b6a"><code>b92f665</code></a>
Add the job-status option (<a
href="https://redirect.github.com/determinatesystems/nix-installer-action/issues/125">#125</a>)</li>
<li><a
href="https://github.com/DeterminateSystems/nix-installer-action/commit/ddfca32d6f9b28188dc2d139c0786e8e69fa8757"><code>ddfca32</code></a>
Convert flakehub: true to determinate: true (<a
href="https://redirect.github.com/determinatesystems/nix-installer-action/issues/123">#123</a>)</li>
<li>See full diff in <a
href="https://github.com/determinatesystems/nix-installer-action/compare/v14...v15">compare
view</a></li>
</ul>
</details>
<br />


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.github/workflows/dev_envs.yml

@@ -18,7 +18,7 @@ jobs:
         fetch-depth: 0
 
     - name: Install Nix
-      uses: DeterminateSystems/nix-installer-action@v14
+      uses: DeterminateSystems/nix-installer-action@v15
     - name: Run the Magic Nix Cache
       uses: DeterminateSystems/magic-nix-cache-action@v8