Update docs/help/specifications-support/multiple-servers.md

Co-authored-by: Christophe Dujarric <christophe@bump.sh>

docs/help/specifications-support/multiple-servers.md

@@ -27,7 +27,7 @@ You can select a different server from this selection component:
 
 ![multiple servers component](/files/help/multiple-servers--component.png)
 
-For REST API documentation, url of selected server is used to generate curl examples.
+For REST API documentation, the url of selected server is used to generate curl examples.
 For Event-Driven API documentation, protocol and protocol versions are updated depending on the selected server.
 
 When sharing a link to the documentation as a reader, the `server_id` query parameter will be passed with the URL, so that the recipient will see the exact same information as the person who shared it.