common-updater-scripts: Replace flake source by local path
common-updater-scripts: Replace flake source by local path

When update-source-version is run in a repo with flake-compat,
it would find the files in Nix store.

Let’s replace them with the local path of the repository.

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