chore(deps): bump nixpkgs from 4bd9165 to b12141e

Bumps [nixpkgs](https://github.com/NixOS/nixpkgs) from `4bd9165` to `b12141e`.
- [Commits](NixOS/nixpkgs@4bd9165...b12141e)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: b12141ef619e0a9c1c84dc8c684040326f27cdcc
  dependency-type: direct:production
...

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Author: dependabot[bot]