build(deps): update flake.lock

[ryanccn]

Automated changes by the update-flake-lock GitHub Action.

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/4f02464258baaf54992debfd010a7a3662a25536?narHash=sha256-UNDpwjYxNXQet/g3mgRLsQ9zxrbm9j2JEvP4ijF3AWs%3D' (2024-07-24)
  → 'github:NixOS/nixpkgs/61448af9e290aec3be42741abaef6a52ae31f6a4?narHash=sha256-dl88NOyUEiEr%2BXmS%2Bb2t9LIK04f66F2vLtbQu2q49Hs%3D' (2024-08-07)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/8b81b8ed00b20fd57b24adcb390bd96ea81ecd90?narHash=sha256-bW2ClCWzGCytPbUnqZwU8P1YsLW07uEs80EfHEctc0Q%3D' (2024-07-25)
  → 'github:oxalica/rust-overlay/fecfe4d7c96fea2982c7907997b387a6b52c1093?narHash=sha256-SFkQfOA%2B8AIYJsPlQtxNP%2Bz5jRLfz91z/aOrV94pPmw%3D' (2024-08-09)

Running GitHub Actions on this PR

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To run GitHub Actions workflows on this PR, run:

git branch -D update_flake_lock_action
git fetch origin
git checkout update_flake_lock_action
git commit --amend --no-edit
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