chore: update flake.lock

[mrcjkb]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/d233902339c02a9c334e7e593de68855ad26c4cb?narHash=sha256-30sZNZoA1cqF5JNO9fVX%2BwgiQYjB7HJqqJ4ztCDeBZE%3D' (2026-05-15)
  → 'github:NixOS/nixpkgs/3d8f0f3f72a6cd4d93d0ad13203f2ea1cb7e1456?narHash=sha256-q%2BfF42iv/geEbHfgSzy3tS0FF/EyD6XTZ98E6yxiBO8%3D' (2026-05-23)

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