chore(flake): update flake.lock

[github-actions[bot]]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/bc194f70731cc5d2b046a6c1b3b15f170f05999c?narHash=sha256-YguPZpiejgzLEcO36/SZULjJQ55iWcjAmf3lYiyV1Fo%3D' (2024-04-19)
  → 'github:NixOS/nixpkgs/a5e4bbcb4780c63c79c87d29ea409abf097de3f7?narHash=sha256-9ZR/Rbx5/Z/JZf5ehVNMoz/s5xjpP0a22tL6qNvLt5E%3D' (2024-04-21)
• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/5672bc9dbf9d88246ddab5ac454e82318d094bb8?narHash=sha256-hOkzkhLT59wR8VaMbh1ESjtZLbGi%2BXNaBN6h49SPqEc%3D' (2024-04-16)
  → 'github:NixOS/nixpkgs/6143fc5eeb9c4f00163267708e26191d1e918932?narHash=sha256-%2Bz/XjO3QJs5rLE5UOf015gdVauVRQd2vZtsFkaXBq2Y%3D' (2024-04-21)
• Updated input 'nixvim':
    'github:nix-community/nixvim/b3ea5256e07ee9105060cffa075028402946bd63?narHash=sha256-g7%2B4SiXDGzIlWIfANyH1J5CeEaY%2BAlah6KOm6IO4nIk%3D' (2024-01-03)
  → 'github:nix-community/nixvim/5bd3cb1ef634f1fc9e88dd5c2a21f11830bf53d1?narHash=sha256-%2B7wCMcTq4/tWw7en91cEjFHEMSk%2BFR/xnw%2BuDNszBSI%3D' (2024-04-22)

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