flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'github:nix-community/fenix/3717a9f4981495d5487642554343acfacf4e64fa?narHash=sha256-b7j/GL7Pvmx9zpGnqjDzrTtLZktipsZSHJyMrLRQRKU%3D' (2024-07-27)
  → 'github:nix-community/fenix/4b8d964df93d1f918ee6c4f003b3548c432cc866?narHash=sha256-5fT%2B96rV7Hx29HG%2B4/oBbr3V%2ByExKuLN2vcBcPbVBlU%3D' (2024-09-07)
• Updated input 'fenix/nixpkgs':
    'github:nixos/nixpkgs/5ad6a14c6bf098e98800b091668718c336effc95?narHash=sha256-Sb1jlyRO%2BN8jBXEX9Pg9Z1Qb8Bw9QyOgLDNMEpmjZ2M%3D' (2024-07-25)
  → 'github:nixos/nixpkgs/ad416d066ca1222956472ab7d0555a6946746a80?narHash=sha256-%2Byj%2BxgsfZaErbfYM3T%2BQvEE2hU7UuE%2BJf0fJCJ8uPS0%3D' (2024-09-04)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/aae54dde8c384acc310455504c9d8909646e0778?narHash=sha256-RenI%2B4lnrMH0DFLU4HlgCZ9X5yadeishI5Liy2XqNOQ%3D' (2024-07-26)
  → 'github:rust-lang/rust-analyzer/08c7bbc2dbe4dcc8968484f1a0e1e6fe7a1d4f6d?narHash=sha256-gNCLk3Zg7JlAwmWbVHTH6f3%2BiqdeQ4fheOotCZy8x5M%3D' (2024-09-06)