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/294eb5975def0caa718fca92dc5a9d656ae392a9?narHash=sha256-WO6Lmbn37PlamY2fDg3B187THkSKU/W01z8SxoIqJd0%3D' (2024-09-18)
  → 'github:NixOS/nixpkgs/a1d92660c6b3b7c26fb883500a80ea9d33321be2?narHash=sha256-V5LpfdHyQkUF7RfOaDPrZDP%2Boqz88lTJrMT1%2BstXNwo%3D' (2024-09-20)

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