fix after copilot review

Author: AJIXuMuK

src/controls/richText/RichText.tsx

@@ -22,6 +22,7 @@ import { initializeIcons } from '@fluentui/react/lib/Icons';
 import { Label } from '@fluentui/react/lib/Label';
 
 const TOOLBARPADDING: number = 28;
+const CONTAINER_CLASS: string = 'pnp-richtext-quill-container';
 /**
  * Creates a rich text editing control that mimics the out-of-the-box
  * SharePoint Rich Text control.