Bump nixpkgs rev and narHash in flake.lock
Updated flake.lock to point nixpkgs to a newer revision and updated narHash and lastModified timestamp.
Changes:
- lastModified: 1760284886 -> 1760524057
- narHash: sha256-TK9Kr0BY... -> sha256-EVAqOteL...
- rev: cf3f5c4def3c7b5f1fc012b3d839575dbe552d43 -> 544961dfcce86422ba200ed9a0b00dd4b1486ec5
This is a dependency lock update; no code changes.