flake.lock: Update

[typelevel-steward[bot]]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/b45ec953794bb07922f0468152ad1ebaf8a084b3' (2022-11-27)
  → 'github:nixos/nixpkgs/a2d2f70b82ada0eadbcb1df2bca32d841a3c1bf1' (2022-12-04)

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