DOC-3503: Update jQuery integration example to jQuery 4 (#4161)

Update the Cloud quick start example to load jQuery 4.0.0, matching
tinymce-jquery v2.3 support for jQuery v4. The jsDelivr tinymce-jquery
reference already resolves to the latest 2.x release.

Author: kemister85

modules/ROOT/partials/integrations/jquery-quick-start.adoc

@@ -173,8 +173,8 @@ ifeval::["{productSource}" == "cloud"]
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <script
-      src="https://code.jquery.com/jquery-3.6.0.min.js"
-      integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="
+      src="https://code.jquery.com/jquery-4.0.0.min.js"
+      integrity="sha256-OaVG6prZf4v69dPg6PhVattBXkcOWQB62pdZ3ORyrao="
       crossorigin="anonymous"
     ></script>
     <script