Update internal flake.lock (#679)

* test/flake.lock: Update

Flake lock file updates:

• Updated input 'advisory-db':
    'github:rustsec/advisory-db/0e7413f7941015a388b58730a53bf2529f50ab14' (2024-07-23)
  → 'github:rustsec/advisory-db/201638b35a3e85b7794e84cc73f876d7a2b7ad51' (2024-08-16)
• Updated input 'crane':
    'github:ipetkov/crane/0081e9c447f3b70822c142908f08ceeb436982b8' (2024-07-23)
  → 'github:ipetkov/crane/4c6c77920b8d44cd6660c1621dea6b3fc4b4c4f4' (2024-08-06)
• Updated input 'fenix':
    'github:nix-community/fenix/31cd6d83e0e3900f10053daf33bd878792946282' (2024-07-24)
  → 'github:nix-community/fenix/73b4e46c0f6e93b104f5a9c9573bd2ad0e319061' (2024-08-18)
• Updated input 'fenix/rust-analyzer-src':
    'github:rust-lang/rust-analyzer/eb5da56d839ae0a9e9f50774fa3eb78eb0964550' (2024-07-23)
  → 'github:rust-lang/rust-analyzer/fa003262474185fd62168379500fe906b331824b' (2024-08-17)
• Updated input 'nixpkgs':
    'github:NixOS/nixpkgs/2e19d60f8f7ad31c7991ac040e7b24c4f1a59bbe' (2024-07-24)
  → 'github:NixOS/nixpkgs/38fb99e12ff992a05641086dba26d1a5849929d1' (2024-08-18)
• Updated input 'nixpkgs-darwin':
    'github:NixOS/nixpkgs/ea73e7ae9dea53d112cb08fb78f4e00d1f686c54' (2024-07-22)
  → 'github:NixOS/nixpkgs/1cbd3d585263dc620c483e138d352a39b9f0e3ec' (2024-08-17)
• Updated input 'rust-overlay':
    'github:oxalica/rust-overlay/a6afdaab4a47d6ecf647a74968e92a51c4a18e5a' (2024-07-24)
  → 'github:oxalica/rust-overlay/456e78a55feade2c3bc6d7bc0bf5e710c9d86120' (2024-08-18)

* examples/build-std: fix build

examples/build-std/flake.nix

@@ -56,7 +56,7 @@
               # to the repo and import it with `./path/to/rustlib/Cargo.lock` which
               # will avoid IFD entirely but will require manually keeping the file
               # up to date!
-              "${rustToolchain.passthru.availableComponents.rust-src}/lib/rustlib/src/rust/Cargo.lock"
+              "${rustToolchain.passthru.availableComponents.rust-src}/lib/rustlib/src/rust/library/Cargo.lock"
             ];
           };