flake: update inputs (#186)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/a71e967ef3694799d0c418c98332f7ff4cc5f6af?narHash=sha256-CyyxvOwFf12I91PBWz43iGT1kjsf5oi6ax7CrvaMyAo%3D' (2024-06-22)
  → 'github:NixOS/nixpkgs/2893f56de08021cffd9b6b6dfc70fd9ccd51eb60?narHash=sha256-ECni%2BIkwXjusHsm9Sexdtq8weAq/yUyt1TWIemXt3Ko%3D' (2024-06-24)
• Updated input 'nixpkgs-stable':
    'github:NixOS/nixpkgs/e4509b3a560c87a8d4cb6f9992b8915abf9e36d8?narHash=sha256-K0i/coxxTEl30tgt4oALaylQfxqbotTSNb1/%2Bg%2BmKMQ%3D' (2024-06-23)
  → 'github:NixOS/nixpkgs/fc07dc3bdf2956ddd64f24612ea7fc894933eb2e?narHash=sha256-A/76RFUVxZ/7Y8%2BOMVL1Lc8LRhBxZ8ZE2bpMnvZ1VpY%3D' (2024-06-24)

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