fix: remove warning when passing initialSelectedItems to ContentExplorer (#3151)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Author: apieceofbart

src/features/content-explorer/content-explorer/ContentExplorer.js

@@ -447,6 +447,7 @@ class ContentExplorer extends Component {
             'onSelectItem',
             'onSearchSubmit',
             'onExitSearch',
+            'initialSelectedItems',
         ]);
 
         const selectedItemsIds = Object.keys(selectedItems);