docs(elements): use Angular Elements naming in nav (#23213)

PR Close #23213

aio/content/guide/elements.md

@@ -1,10 +1,10 @@
-# Custom Elements Overview
+# Angular Elements Overview
 
 [Custom elements](https://developer.mozilla.org/en-US/docs/Web/Web_Components/Using_custom_elements) are a Web Platform feature currently supported by Chrome, Opera, and Safari, and available in other browsers through polyfills (see [Browser Support](#browser-support)).
 A custom element extends HTML by allowing you to define a tag whose content is created and controlled by JavaScript code. 
 The browser maintains a `CustomElementRegistry` of defined custom elements (also called Web Components), which maps an instantiable JavaScript class to an HTML tag.
 
-The `createCustomElement()` API provides a bridge from Angular's component interface and change detection functionality to the built-in DOM API. 
+The `@angular/elements` package exports a `createCustomElement()` API that provides a bridge from Angular's component interface and change detection functionality to the built-in DOM API. 
 
 Transforming a component to a custom element makes all of the required Angular infrastructure available to the browser. Creating a custom element is simple and straightforward, and automatically connects your component-defined view with change detection and data binding, mapping Angular functionality to the corresponding native HTML equivalents. 
 

aio/content/navigation.json

@@ -186,8 +186,8 @@
             },
             {
               "url": "guide/elements",
-              "title": "Custom Elements",
-              "tooltip": "Convert components to custom elements."
+              "title": "Angular Elements",
+              "tooltip": "Convert components to Custom Elements."
             },
             {
               "url": "guide/dynamic-component-loader",