Docs: Add missing `$which` parameter descriptions.

Follow up of [46211].

See #45954.

git-svn-id: https://develop.svn.wordpress.org/trunk@46212 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-ms-sites-list-table.php

@@ -218,7 +218,7 @@ class WP_MS_Sites_List_Table extends WP_List_Table {
 	/**
 	 * @global string $mode List table view mode.
 	 *
-	 * @param string $which
+	 * @param string $which The location of the pagination nav markup: 'top' or 'bottom'.
 	 */
 	protected function pagination( $which ) {
 		global $mode;
@@ -235,7 +235,7 @@ class WP_MS_Sites_List_Table extends WP_List_Table {
 	 *
 	 * @since 5.3.0
 	 *
-	 * @param string $which
+	 * @param string $which The location of the extra table nav markup: 'top' or 'bottom'.
 	 */
 	protected function extra_tablenav( $which ) {
 		?>