build(deps): bump nix from 0.26.1 to 0.26.2

Bumps [nix](https:/nix-rust/nix) from 0.26.1 to 0.26.2.
- [Release notes](https:/nix-rust/nix/releases)
- [Changelog](https:/nix-rust/nix/blob/v0.26.2/CHANGELOG.md)
- [Commits](nix-rust/nix@v0.26.1...v0.26.2)

---
updated-dependencies:
- dependency-name: nix
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>