flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/1d9c2c9b3e71b9ee663d11c5d298727dace8d374?narHash=sha256-8MUgifkJ7lkZs3u99UDZMB4kbOxvMEXQZ31FO3SopZ0%3D' (2024-07-19)
  → 'github:nixos/nixpkgs/68c9ed8bbed9dfce253cc91560bf9043297ef2fe?narHash=sha256-Tybxt65eyOARf285hMHIJ2uul8SULjFZbT9ZaEeUnP8%3D' (2024-07-21)
• Updated input 'nixvim':
    'github:nix-community/nixvim/d2f733efb4962903b77af330c4c03a63f2f72968?narHash=sha256-pJzkjy4%2BsM9%2B5IfrZMTWAiB0m/m4eiV4fmnqxtVNonI%3D' (2024-07-21)
  → 'github:nix-community/nixvim/216d64c158da5523d5b3db0895e1345175c21502?narHash=sha256-iWTGRfYoq0ppT3P4D2bRDVkLuTZAzuud/gsxVzPTHDg%3D' (2024-07-24)
• Updated input 'nixvim/git-hooks':
    'github:cachix/git-hooks.nix/8d6a17d0cdf411c55f12602624df6368ad86fac1?narHash=sha256-ni/87oHPZm6Gv0ECYxr1f6uxB0UKBWJ6HvS7lwLU6oY%3D' (2024-07-09)
  → 'github:cachix/git-hooks.nix/f451c19376071a90d8c58ab1a953c6e9840527fd?narHash=sha256-6FPUl7HVtvRHCCBQne7Ylp4p%2BdpP3P/OYuzjztZ4s70%3D' (2024-07-15)
• Updated input 'nixvim/home-manager':
    'github:nix-community/home-manager/90ae324e2c56af10f20549ab72014804a3064c7f?narHash=sha256-neWQ8eNtLTd%2BYMesb7WjKl1SVCbDyCm46LUgP/g/hdo%3D' (2024-07-11)
  → 'github:nix-community/home-manager/635563f245309ef5320f80c7ebcb89b2398d2949?narHash=sha256-XpZOkaSJKdOsz1wU6JfO59Rx2fqtcarQ0y6ndIOKNpI%3D' (2024-07-21)
• Updated input 'nixvim/nix-darwin':
    'github:lnl7/nix-darwin/5ce8503cf402cf76b203eba4b7e402bea8e44abc?narHash=sha256-yPhAsJTpyoIPQZJGC8Fw8W2lAXyhLoTn%2BHP20bmfkfk%3D' (2024-07-13)
  → 'github:lnl7/nix-darwin/2ae24bcafdb88fdf70b061cc8b18d070dbd9013a?narHash=sha256-eJQQwXOKWjom9gtb7HvHd3%2BWj5Sp%2BWrYR44r0EnaO5w%3D' (2024-07-22)
• Updated input 'nixvim/nixpkgs':
    'github:NixOS/nixpkgs/7e7c39ea35c5cdd002cd4588b03a3fb9ece6fad9?narHash=sha256-EYekUHJE2gxeo2pM/zM9Wlqw1Uw2XTJXOSAO79ksc4Y%3D' (2024-07-12)
  → 'github:NixOS/nixpkgs/68c9ed8bbed9dfce253cc91560bf9043297ef2fe?narHash=sha256-Tybxt65eyOARf285hMHIJ2uul8SULjFZbT9ZaEeUnP8%3D' (2024-07-21)
• Updated input 'nixvim/treefmt-nix':
    'github:numtide/treefmt-nix/5b002f8a53ed04c1a4177e7b00809d57bd2c696f?narHash=sha256-f52x9srIcqQm1Df3T%2BxYR5P6VfdnDFa2vkkcLhlTp6U%3D' (2024-07-12)
  → 'github:numtide/treefmt-nix/888bfb10a9b091d9ed2f5f8064de8d488f7b7c97?narHash=sha256-wNXLQ/ATs1S4Opg1PmuNoJ%2BWamqj93rgZYV3Di7kxkg%3D' (2024-07-20)