flake: update inputs (#358)

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/c04d5652cfa9742b1d519688f65d1bbccea9eb7e?narHash=sha256-PmUr/2GQGvFTIJ6/Tvsins7Q43KTMvMFhvG6oaYK%2BWk%3D' (2024-09-19)
  → 'github:NixOS/nixpkgs/9357f4f23713673f310988025d9dc261c20e70c6?narHash=sha256-bvGoiQBvponpZh8ClUcmJ6QnsNKw0EMrCQJARK3bI1c%3D' (2024-09-21)
• Updated input 'nixpkgs-stable':
    'github:NixOS/nixpkgs/944b2aea7f0a2d7c79f72468106bc5510cbf5101?narHash=sha256-NmcVhGElxDbmEWzgXsyAjlRhUus/nEqPC5So7BOJLUM%3D' (2024-09-20)
  → 'github:NixOS/nixpkgs/23cbb250f3bf4f516a2d0bf03c51a30900848075?narHash=sha256-8fnFlXBgM/uSvBlLWjZ0Z0sOdRBesyNdH0%2BesxqizGc%3D' (2024-09-22)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/36d73192555e569d27579f6c486fea3ab768823c?narHash=sha256-FlL/bNESOtDQoczRhmPfReNAmLqVg%2BdAX4HectPOOf0%3D' (2024-09-22)
  → 'github:oxalica/rust-overlay/edc5b0f896170f07bd39ad59d6186fcc7859bbb2?narHash=sha256-tY/UU3Qk5gP/J0uUM4DZ6wo4arNLGAVqLKBotILykfQ%3D' (2024-09-23)

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