fix README

Author: nick1udwig

README.md

@@ -4,7 +4,7 @@ Library of functions for more ergonomic kinode process development.
 
 To develop/build:
 ```
-git submodule add https://github.com/uqbar-dao/kinode-wit.git
+git submodule update --init
 ```
 
 Docs: (TODO link)