Docs: Add missing parameter descriptions to the DocBlock for `WP_Query::set_found_posts()`.

See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@35968 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/query.php

@@ -3770,6 +3770,9 @@ class WP_Query {
 	 * @access private
 	 *
 	 * @global wpdb $wpdb WordPress database abstraction object.
+	 *
+	 * @param array  $q      Query variables.
+	 * @param string $limits LIMIT clauses of the query.
 	 */
 	private function set_found_posts( $q, $limits ) {
 		global $wpdb;