flake.lock: Update

Created by: github-actions[bot]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/1fc7212a2c3992eedc6eedf498955c321ad81cc2' (2022-03-05)
  → 'github:NixOS/nixpkgs/e9545762b032559c27d8ec9141ed63ceca1aa1ac' (2022-03-10)

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