fix lint errors

packages/app/src/components/PageEditor/Editor.tsx

@@ -358,5 +358,6 @@ const Editor = React.forwardRef((props: EditorPropsType, ref): JSX.Element => {
   );
 });
 
+Editor.displayName = 'Editor';
 
 export default Editor;

packages/app/src/components/TableOfContents.tsx

@@ -15,7 +15,6 @@ import { StickyStretchableScroller } from './StickyStretchableScroller';
 import styles from './TableOfContents.module.scss';
 
 
-
 // eslint-disable-next-line no-unused-vars
 const logger = loggerFactory('growi:TableOfContents');