flake.lock: Update (#1202)

Flake lock file updates:

• Updated input 'flake-parts':
    'github:hercules-ci/flake-parts/9305fe4e5c2a6fcf5ba6a3ff155720fbe4076569?narHash=sha256-tYBdgS56eXYaWVW3fsnPQ/nFlgWi/Z2Ymhyu21zVM98%3D' (2025-06-08)
  → 'github:hercules-ci/flake-parts/77826244401ea9de6e3bac47c2db46005e1f30b5?narHash=sha256-Tyw1RjYEsp5scoigs1384gIg6e0GoBVjms4aXFfRssQ%3D' (2025-07-01)
• Updated input 'flake-parts/nixpkgs-lib':
    'github:nix-community/nixpkgs.lib/656a64127e9d791a334452c6b6606d17539476e2?narHash=sha256-rQaysilft1aVMwF14xIdGS3sj1yHlI6oKQNBRTF40cc%3D' (2025-06-01)
  → 'github:nix-community/nixpkgs.lib/14a40a1d7fb9afa4739275ac642ed7301a9ba1ab?narHash=sha256-urW/Ylk9FIfvXfliA1ywh75yszAbiTEVgpPeinFyVZo%3D' (2025-06-29)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/30e2e2857ba47844aa71991daa6ed1fc678bcbb7?narHash=sha256-krGXKxvkBhnrSC/kGBmg5MyupUUT5R6IBCLEzx9jhMM%3D' (2025-06-27)
  → 'github:NixOS/nixpkgs/5c724ed1388e53cc231ed98330a60eb2f7be4be3?narHash=sha256-xVNy/XopSfIG9c46nRmPaKfH1Gn/56vQ8%2B%2BxWA8itO4%3D' (2025-07-04)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/1712a6d3430ca75353d366b7ddd1c79d6b243efc?narHash=sha256-/SRmXIPxL7ixFLZgcDdgZDuIwt8eWQAamMYer0ODwbM%3D' (2025-06-28)
  → 'github:oxalica/rust-overlay/9e5e62a33a929a67a5427fb7324a6f583dced0b2?narHash=sha256-dYO5X5jK8bpQOeRAo8R5aUt6M/%2BJi1cZgstZI7SQ2IA%3D' (2025-07-05)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>