flake: update inputs

[getchoo]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.584422%2Brev-a4d4fe8c5002202493e87ec8dbc91335ff55552c/018dad59-c2e8-7e35-bb7c-808d295bb34a/source.tar.gz?narHash=sha256-ZL2TrjVsiFNKOYwYQozpbvQSwvtV/3Me7Zwhmdsfyu4%3D' (2024-02-15)
  → 'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.587158%2Brev-cbc4211f0afffe6dfd2478a62615dd5175a13f9a/018dd7db-96ac-7fc3-9238-a3a1b9aeb917/source.tar.gz?narHash=sha256-ZrP/yACUvDB%2BzbqYJsln4iwotbH6CTZiTkANJ0AgDv4%3D' (2024-02-23)

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