chore(deps): bump nixpkgs from 8a1b012 to 6dedf69

Bumps [nixpkgs](https://github.com/nixos/nixpkgs) from `8a1b012` to `6dedf69`.
- [Commits](NixOS/nixpkgs@8a1b012...6dedf69)

---
updated-dependencies:
- dependency-name: nixpkgs
  dependency-version: 6dedf69f94d03cbe7bdde106f2d4c23ae2a853bf
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]