chore: Update flake.lock

Flake lock file updates:

• Updated input 'nixpkgs':
    'github:nixos/nixpkgs/2893f56de08021cffd9b6b6dfc70fd9ccd51eb60?narHash=sha256-ECni%2BIkwXjusHsm9Sexdtq8weAq/yUyt1TWIemXt3Ko%3D' (2024-06-24)
  → 'github:nixos/nixpkgs/b2852eb9365c6de48ffb0dc2c9562591f652242a?narHash=sha256-C8e9S7RzshSdHB7L%2Bv9I51af1gDM5unhJ2xO1ywxNH8%3D' (2024-06-27)
• Updated input 'nixvim':
    'github:nix-community/nixvim/1b3bda78b40cb85341b69d86e39f09634fef18a1?narHash=sha256-wo5cSMk4lM5Nk669Rcd3jVDtsqAlcFUM/6tRSKdo11c%3D' (2024-06-28)
  → 'github:nix-community/nixvim/049bbc168fe449cca37ddf3b0b56c4f93408052b?narHash=sha256-65P3TcZi0s%2BdOc9uG6/%2B3bO3/IhG71RDjbkF44HjIfs%3D' (2024-06-29)
• Updated input 'nixvim/home-manager':
    'github:nix-community/home-manager/1a4f12ae0bda877ec4099b429cf439aad897d7e9?narHash=sha256-/Vmso2ZMoFE3M7d1MRsQ2K5sR8CVKnrM6t1ys9Xjpz4%3D' (2024-06-26)
  → 'github:nix-community/home-manager/7e68e55d2e16d3a1e92a679430728c35a30fd24e?narHash=sha256-A03i8xiVgP14DCmV5P7VUv37eodCjY4e1iai0b2EuuM%3D' (2024-06-28)