Escape /Users/desudhak/.oh-my-zsh path (previously broke spaces in path)

tools/upgrade.sh

 current_path=`pwd`
 printf '\033[0;34m%s\033[0m\n' "Upgrading Oh My Zsh"
-cd $ZSH
+cd "$ZSH"
 
 if git pull origin master
 then
@@ -16,4 +16,4 @@ else
   printf '\033[0;31m%s\033[0m\n' 'There was an error updating. Try again later?'
 fi
 
-cd "$current_path"
\ No newline at end of file
+cd "$current_path"