Update xml-capabilities.md

Author: mattqual

src/overview/xml-capabilities.md

@@ -7,13 +7,13 @@ The ShockScript language includes XML capabilities.
 XML expressions by default are used for creating implementation-defined objects; however, when the inference type is `XML` or `XMLList`, XML expressions evaluate to one of these types.
 
 ```
-package com.business.editor {
+package com.business.components {
     //
-    public function SomeBar() {
+    public function AppBar() {
         return (
-            <j:VGroup gap={5}>
-                <j:Label>Hi, there.</j:Label>
-            </j:VGroup>
+            <j:HGroup>
+                <j:Button click&={trace("clicked!")}>button 1</j:Button>
+            </j:HGroup>
         );
     }
 }