Actions to take after repository migration is complete (#8394)

* Change project URL from robbyrussell to ohmyzsh org

* Update git remote to use ohmyzsh org repository

templates/zshrc.zsh-template

@@ -7,7 +7,7 @@ export ZSH=$HOME/.oh-my-zsh
 # Set name of the theme to load --- if set to "random", it will
 # load a random theme each time oh-my-zsh is loaded, in which case,
 # to know which specific one was loaded, run: echo $RANDOM_THEME
-# See https://github.com/robbyrussell/oh-my-zsh/wiki/Themes
+# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes
 ZSH_THEME="robbyrussell"
 
 # Set list of themes to pick from when loading at random