Update flake.lock

[gaelreyrol]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/36fd87baa9083f34f7f5027900b62ee6d09b1f2f?narHash=sha256-Wh7esNh7G24qYleLvgOSY/7HlDUzWaL/n4qzlBePpiw%3D' (2025-03-07)
  → 'github:NixOS/nixpkgs/2631b0b7abcea6e640ce31cd78ea58910d31e650?narHash=sha256-LWqduOgLHCFxiTNYi3Uj5Lgz0SR%2BXhw3kr/3Xd0GPTM%3D' (2025-04-12)

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