Adjusts two hubs-docs links

Why: their ids & paths have been changed on hubs-docs

Author: DougReeder

admin/src/react-components/pages/system-editor.tsx

@@ -150,7 +150,7 @@ const SystemEditorComponent = ({ classes }) => {
 
           <CardSection
             ctaCallback={() => {
-              window.open("https://docs.hubsfoundation.org/hubs-cloud-limiting-user-access.html");
+              window.open("https://docs.hubsfoundation.org/admin-limiting-user-access");
             }}
             cta="Limit access guide"
             body="Learn how to control who can enter your hub’s rooms."

admin/src/react-components/service-editor.js

@@ -440,7 +440,7 @@ class ConfigurationEditor extends Component {
           hub's rooms (More > Preferences > Misc > Theme).More information about customizing your hubs'
           themes can be found in our{" "}
           <a
-            href="https://docs.hubsfoundation.org/hubs-cloud-customizing-themes.html"
+            href="https://docs.hubsfoundation.org/admin-customizing-themes.html"
             target="_blank"
             rel="noopener noreferrer"
             className="link"