perf(rich-text-editor): remove duplicate heading extension

remove duplicate heading extension

✅ Closes: COMUI-2981

packages/genesys-spark-components/src/components/beta/gux-rich-text-editor/example.html

@@ -92,21 +92,18 @@ <h2>No action divider</h2>
   // - Editor: Main class to create and manipulate the text editor.
   // - StarterKit: Provides basic functionality like bold, italic, lists, etc.
   // - Underline: Adds underline support to the editor.
-  // - Heading: Adds heading levels (H1, H2, H3) to the editor.
   // - Link : Creates a hyperlink for highlighted text.
   const { Editor } = await import('https://cdn.jsdelivr.net/npm/@tiptap/core@2.2.2/+esm');
   const StarterKit = (await import('https://cdn.jsdelivr.net/npm/@tiptap/starter-kit@2.2.2/+esm')).default;
   const Underline = (await import('https://cdn.jsdelivr.net/npm/@tiptap/extension-underline@2.2.2/+esm')).default;
-  const Heading = (await import('https://cdn.jsdelivr.net/npm/@tiptap/extension-heading@2.7.4/+esm')).default;
   const Link = (await import('https://cdn.jsdelivr.net/npm/@tiptap/extension-link@2.7.4/+esm')).default;
   const Highlight = (await import('https://cdn.jsdelivr.net/npm/@tiptap/extension-highlight@2.7.4/+esm')).default;
     
 // Initialize the editor
 const editor = new Editor({
   element: document.querySelector('.editorElement'),
-  extensions: [StarterKit, Underline, Highlight, Heading.configure({
-      levels: [1, 2, 3], // Allows heading levels 1, 2, and 3.
-    }),Link.configure({
+  extensions: [StarterKit, Underline, Highlight
+    ,Link.configure({
       openOnClick: true,      // Automatically opens links when clicked.
       autolink: false,         // Automatically creates links when typing URLs.
       defaultProtocol: 'https', // Default protocol for links if not specified.