flake.lock: Update

[github-actions[bot]]

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

Flake lock file updates:

• Updated input 'nixos-unstable':
    'github:NixOS/nixpkgs/c9ed026def59fe978203a2b28eccdbaa7e5fadc9?narHash=sha256-aE4vMfHfpX6KP9VWqVdXtoDUlvFR34wEIjqsqnKrVdY%3D' (2024-07-21)
  → 'github:NixOS/nixpkgs/4cc8b29327bed3d52b40041f810f49734298af46?narHash=sha256-jfF4gpRUpTBY2OxDB0FRySsgNGOiuDckEtu7YDQom3Y%3D' (2024-07-21)

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