fix icon typo

Author: ibgrav

docs/overviews/overview-publishers.md

@@ -6,7 +6,7 @@ sidebar_position: 02
 use_banner: true
 banner_title: UID2 Overview for Publishers
 banner_description: Maintain audience targeting in the ever-changing advertising industry for better impression monetization and more relevance.
-banner_icon: 'document'
+banner_icon: 'documents'
 banner_background_color: ''
 banner_background_color_dark: ''
 displayed_sidebar: sidebarPublishers