Fix URLs in examples

Author: rfay

README.md

@@ -26,8 +26,8 @@ ddev nightwatch --tag core
 
 ## Nightwatch Examples
 
-You can watch Nightwatch running in real time at https://drupal.ddev.site:7900
-for Chrome and https://drupal.ddev.site:7901 for Firefox. The password is
+You can watch Nightwatch running in real time at https://core-dev.ddev.site:7900
+for Chrome and https://core-dev.ddev.site:7901 for Firefox. The password is
 "secret". YMMV using Firefox as core tests don't currently run on it.
 
 Only core tests