doc: fix wrong output of example in url.password

Tailing slash of url.href is ommited.

PR-URL: #45928
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

doc/api/url.md

@@ -332,7 +332,7 @@ console.log(myURL.password);
 
 myURL.password = '123';
 console.log(myURL.href);
-// Prints https://abc:123@example.com
+// Prints https://abc:123@example.com/
 ```
 
 Invalid URL characters included in the value assigned to the `password` property