chore: run nix flake update

[github-actions]

Automated changes by the update-flake-lock GitHub Action.

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/9126214' (2024-04-01)
  → 'github:hercules-ci/flake-parts/80daad0' (2026-01-11)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/7bb2ccd' (2024-04-25)
  → 'github:NixOS/nixpkgs/bfc1b8a' (2026-01-26)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/c6aaf72' (2024-04-25)
  → 'github:numtide/treefmt-nix/28b19c5' (2026-01-29)

Running GitHub Actions on this PR

GitHub Actions will not run workflows on pull requests which are opened by a GitHub Action.

To run GitHub Actions workflows on this PR, run:

git branch -D update_flake_lock_action
git fetch origin
git checkout update_flake_lock_action
git commit --amend --no-edit
git push origin update_flake_lock_action --force