chore: update flake.lock (#328)

Flake lock file updates:

• Updated input 'devshell':
    'github:numtide/devshell/fd6223370774dd9c33354e87a007004b5fd36442' (2023-06-13)
  → 'github:numtide/devshell/2cf83bb31720fcc29a999aee28d6da101173e66a' (2023-06-19)
• Updated input 'foundry-nix':
    'github:shazow/foundry.nix/c80b4ea3bdce135164a7aac78aafb7c619b2dd23' (2023-06-04)
  → 'github:shazow/foundry.nix/7c8dbb38d8c3ada5a0336960bdfb70ce6112cdca' (2023-06-23)
• Updated input 'nixpkgs-unstable':
    'github:nixos/nixpkgs/2c09e8eb8717e240ef9c5727c1cc9186db9fb309' (2023-06-17)
  → 'github:nixos/nixpkgs/3d8a93602bc54ece7a4e689d9aea1a574e2bbc24' (2023-06-23)
• Updated input 'treefmt-nix':
    'github:numtide/treefmt-nix/6521a278bcba66b440554cc1350403594367b4ac' (2023-05-31)
  → 'github:numtide/treefmt-nix/b100498935f04a70605dfde0edc6e311d865b869' (2023-06-24)

Co-authored-by: Bottie McBotFace <[email protected]>

Author: github-actions[bot]