Add note about GitHub SSH URL format (#223)

Author: hardillb

docs/user-guide/projects/index.md

@@ -222,6 +222,9 @@ you must provide it here.
 *Note:* for `http` urls, do not include your username and/or password in the url
 itself. You can should provide those separately when prompted.
 
+For `ssh` urls from GitHub they will need to be changed from 
+`[email protected]:username/project` to `ssh://[email protected]/username/project`
+
 *Node-RED does not currently make use of any credential helper you git client may be
 configured with. This is an area we look for feedback on from the community.*