fastfetch: update description to match the project

  };

  meta = {

    description = "Like neofetch, but much faster because written in C";

    description = "An actively maintained, feature-rich and performance oriented, neofetch like system information tool";

    homepage = "https://github.com/fastfetch-cli/fastfetch";

    changelog = "https://github.com/fastfetch-cli/fastfetch/releases/tag/${finalAttrs.version}";

    license = lib.licenses.mit;