Update flake.lock

[github-actions]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/e3e32b642a31e6714ec1b712de8c91a3352ce7e1?narHash=sha256-7rTAMNTY1xoBwz0h7ZMtEcd8LELk9R5TzBPoHuhNSCk%3D' (2025-03-09)
  → 'github:nixos/nixpkgs/6607cf789e541e7873d40d3a8f7815ea92204f32?narHash=sha256-cPfs8qMccim2RBgtKGF%2Bx9IBCduRvd/N5F4nYpU0TVE%3D' (2025-03-13)

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