Update SHARCNET git Nix URLs for creating of Nix group

README.md

@@ -20,7 +20,7 @@ need to clone a copy (use your SHARCNET credentials)
 
 ```sh
 cd ~
-git clone https://git.sharcnet.ca/tyson/nix-nixpkgs-sharcnet.git
+git clone https://git.sharcnet.ca/nix/nixpkgs-sharcnet.git
 ```
 
 If you already have a copy, you can update to the latest version
@@ -81,4 +81,4 @@ To undo the last install/update/remove command
 
 ```sh
 nix-env --rollback
-```
+```