borgbackup: update description
borgbackup: update description

While it is true borg started as a fork of Attic, this is ancient history.

'attic fork' confused me, suggesting this was some custom fork of borgbackup
instead of the regular version.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs