Update rich_text_editor.md (#5201)

The previous code snippet encountered a syntax error when attempting to use it in my application. To ensure its usability for others, I have made necessary updates to resolve the syntax error and enable successful execution. These modifications aim to provide a code snippet that can be easily utilized by anyone without encountering any syntax-related issues.

docs/api/rich_text_editor.md

@@ -65,8 +65,8 @@ rte.add('bold', {
 });
 rte.add('link', {
   icon: document.getElementById('t'),
-  attributes: {title: 'Link',}
+  attributes: { title: 'Link' },
-  // Example on it's easy to wrap a selected content
+  // Example on how to wrap selected content
   result: rte => rte.insertHTML(`<a href="#">${rte.selection()}</a>`)
 });
 // An example with fontSize