flake.lock: Update

Flake lock file updates:

• Updated input 'flake-utils':
    'github:numtide/flake-utils/1ef2e671c3b0c19053962c07dbda38332dcebf26' (2024-01-15)
  → 'github:numtide/flake-utils/b1d9ab70662946ef0850d488da1c9019f3a9752a' (2024-03-11)
• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/3030f185ba6a4bf4f18b87f345f104e6a6961f34' (2024-03-09)
  → 'github:nixos/nixpkgs/d603719ec6e294f034936c0d0dc06f689d91b6c3' (2024-06-20)
• Updated input 'pre-commit-hooks':
    'github:cachix/pre-commit-hooks.nix/5df5a70ad7575f6601d91f0efec95dd9bc619431' (2024-02-15)
  → 'github:cachix/pre-commit-hooks.nix/8cd35b9496d21a6c55164d8547d9d5280162b07a' (2024-06-20)
• Removed input 'pre-commit-hooks/flake-utils'
• Updated input 'pre-commit-hooks/gitignore':
    'github:hercules-ci/gitignore.nix/43e1aa1308018f37118e34d3a9cb4f5e75dc11d5' (2023-12-29)
  → 'github:hercules-ci/gitignore.nix/637db329424fd7e46cf4185293b9cc8c88c95394' (2024-02-28)
• Updated input 'pre-commit-hooks/nixpkgs-stable':
    'github:NixOS/nixpkgs/3dc440faeee9e889fe2d1b4d25ad0f430d449356' (2024-01-10)
  → 'github:NixOS/nixpkgs/842253bf992c3a7157b67600c2857193f126563a' (2024-06-15)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/4ee92bf124fbc4e157cbce1bc2a35499866989fc' (2024-02-16)
  → 'github:oxalica/rust-overlay/ff019b65a656d36dca3e57b43c40c44eec7852c5' (2024-06-22)
• Removed input 'rust-overlay/flake-utils'
• Removed input 'rust-overlay/flake-utils/systems'
• Updated input 'rust-overlay/nixpkgs':
    'github:NixOS/nixpkgs/90f456026d284c22b3e3497be980b2e47d0b28ac' (2024-01-29)
  → 'github:NixOS/nixpkgs/e6cea36f83499eb4e9cd184c8a8e823296b50ad5' (2024-06-15)