chore(deps): Bump nixpkgs from 10e7ad5 to a4bf066 (#15)

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `10e7ad5` to
`a4bf066`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/a4bf06618f0b5ee50f14ed8f0da77d34ecc19160"><code>a4bf066</code></a>
[Backport release-25.11] .github: Bump cachix/install-nix-action from
31.10.4...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/6826611f551cb977352a3f85471458023cd49101"><code>6826611</code></a>
.github: Bump cachix/install-nix-action from 31.10.4 to 31.10.5</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/e8bd7fb758feb96d2ad433ce776ff07582a3d616"><code>e8bd7fb</code></a>
[Backport release-25.11] .github: Bump korthout/backport-action from
4.3.0 to...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/2d88aef387652e2ac534f6aab2eaf39aef8c3712"><code>2d88aef</code></a>
.github: Bump korthout/backport-action from 4.3.0 to 4.4.0</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/e2b2e5a6952b5a07e10ff05037b15b093ca98060"><code>e2b2e5a</code></a>
[Backport release-25.11] erlang_28: 28.4.3 -&gt; 28.5 (<a
href="https://redirect.github.com/NixOS/nixpkgs/issues/513053">#513053</a>)</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/4e8296a8084de7ed623bd1c2d33afef167af8400"><code>4e8296a</code></a>
[Backport release-25.11] ungoogled-chromium: 147.0.7727.101-1 -&gt;
147.0.7727.1...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/95a84901cd73a64cf00f553ca6bf79d684274f85"><code>95a8490</code></a>
[Backport release-25.11] teleport_18: 18.7.0 -&gt; 18.7.2; teleport_17:
17.7.19 ...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/efabaaa594dd325212bb8406be87255cf4950a35"><code>efabaaa</code></a>
[Backport release-25.11] nixos/restic: prevent start when rebuilding
system (...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/2f9b5800e3844f21f47f38aa0615b407d5bb1885"><code>2f9b580</code></a>
[Backport release-25.11] noriskclient-launcher-unwrapped: 0.6.17 -&gt;
0.6.19 (#...</li>
<li><a
href="https://github.com/NixOS/nixpkgs/commit/47f085fd632744f86eb32bf929c9c6dd5bca6f8c"><code>47f085f</code></a>
teleport_17: 17.7.19 -&gt; 17.7.20</li>
<li>Additional commits viewable in <a
href="https://github.com/NixOS/nixpkgs/compare/10e7ad5bbcb421fe07e3a4ad53a634b0cd57ffac...a4bf06618f0b5ee50f14ed8f0da77d34ecc19160">compare
view</a></li>
</ul>
</details>
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