chore(deps): bump nixpkgs in the nix-all group (#554)

Bumps the nix-all group with 1 update: [nixpkgs](https://github.com/NixOS/nixpkgs).


Updates `nixpkgs` from `d233902` to `3d8f0f3`
- [Commits](NixOS/nixpkgs@d233902...3d8f0f3)
chore(deps): bump nixpkgs in /ci in the nix-all group

Bumps the nix-all group in /ci with 1 update: [nixpkgs](https://github.com/NixOS/nixpkgs).


Updates `nixpkgs` from `d233902` to `3d8f0f3`
- [Commits](NixOS/nixpkgs@d233902...3d8f0f3)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: 3d8f0f3f72a6cd4d93d0ad13203f2ea1cb7e1456
  dependency-type: direct:production
  dependency-group: nix-all
- dependency-name: nixpkgs
  dependency-version: 3d8f0f3f72a6cd4d93d0ad13203f2ea1cb7e1456
  dependency-type: direct:production
  dependency-group: nix-all
...

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Author: dependabot[bot]