dockerTools streamNixShellImage implements a facsimile of the environment created by the Nix build process. In order to keep track of the Nix features implemented, the streamNixShellImage code has comments containing hyperlinks indicating the corresponding Nix C++ code in the GitHub repository. As Nix 2.32.0 has now been released [1], this patch updates the GitHub links to correspond to the code in the new version. [1] https://discourse.nixos.org/t/nix-2-32-0-released/70528