Update flake/Rust dependencies (#883)

* flake.lock: Update

Flake lock file updates:

• Updated input 'fenix':
    'https://api.flakehub.com/f/pinned/nix-community/fenix/0.1.1762%2Brev-668102037129923cd0fc239d864fce71eabdc6a3/018d63bb-6455-7a2f-98c6-74a36b8216a4/source.tar.gz?narHash=sha256-4o6TMpzBHO659EiJTzd/EGQGUDdbgwKwhqf3u6b23U8%3D' (2024-02-01)
  → 'https://api.flakehub.com/f/pinned/nix-community/fenix/0.1.1791%2Brev-4be608f4f81d351aacca01b21ffd91028c23cc22/018df913-b6d3-756c-b05c-358eca6e487d/source.tar.gz?narHash=sha256-O6EC6QELBLHzhdzBOJj0chx8AOcd4nDRECIagfT5Nd0%3D' (2024-03-01)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/42cb1a2bd79af321b0cc503d2960b73f34e2f92b' (2024-01-31)
  → 'github:rust-lang/rust-analyzer/9efa23c4dacee88b93540632eb3d88c5dfebfe17' (2024-02-29)
• Updated input 'nixpkgs':
    'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.567011%2Brev-46ae0210ce163b3cba6c7da08840c1d63de9c701/018ce71d-40cb-7594-bc00-f31ffedcdfa4/source.tar.gz?narHash=sha256-1734d3mQuux9ySvwf6axRWZRBhtcZA9Q8eftD6EZg6U%3D' (2024-01-06)
  → 'https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.592007%2Brev-9df3e30ce24fd28c7b3e2de0d986769db5d6225d/018e1732-2a3c-7a76-9ec9-7272cb294c13/source.tar.gz?narHash=sha256-6hqgQ8OK6gsMu1VtcGKBxKQInRLHtzulDo9Z5jxHEFY%3D' (2024-03-06)

* Update cargo deps