chore: update flake.lock

[jwillikers]

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

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/a1185f4064c18a5db37c5c84e5638c78b46e3341?narHash=sha256-DDe16FJk18sadknQKKG/9FbwEro7A57tg9vB5kxZ8kY%3D' (2025-03-16)
  → 'github:NixOS/nixpkgs/26d499fc9f1d567283d5d56fcf367edd815dba1d?narHash=sha256-FHlSkNqFmPxPJvy%2B6fNLaNeWnF1lZSgqVCl/eWaJRc4%3D' (2025-04-12)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/59f17850021620cd348ad2e9c0c64f4e6325ce2a?narHash=sha256-b4SZc6TkKw8WQQssbN5O2DaCEzmFfvSTPYHlx/SFW9Y%3D' (2025-03-15)
  → 'github:cachix/pre-commit-hooks.nix/dcf5072734cb576d2b0c59b2ac44f5050b5eac82?narHash=sha256-DwOTp7nvfi8mRfuL1escHDXabVXFGT1VlPD1JHrtrco%3D' (2025-03-22)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/3d0579f5cc93436052d94b73925b48973a104204?narHash=sha256-mL1szCeIsjh6Khn3nH2cYtwO5YXG6gBiTw1A30iGeDU%3D' (2025-02-17)
  → 'github:numtide/treefmt-nix/49d05555ccdd2592300099d6a657cc33571f4fe0?narHash=sha256-IPFcShGro/UUp8BmwMBkq%2B6KscPlWQevZi9qqIwVUWg%3D' (2025-04-15)

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