Docs: Correct $wp_the_query global reference in `WP_Query::is_main_…

…query()`.

Follow-up to [18699], [32620], [34337], [45739].

See #59651.

git-svn-id: https://develop.svn.wordpress.org/trunk@57195 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-query.php

@@ -4661,7 +4661,7 @@ public function is_embed() {
 	 *
 	 * @since 3.3.0
 	 *
-	 * @global WP_Query $wp_query WordPress Query object.
+	 * @global WP_Query $wp_the_query WordPress Query object.
 	 *
 	 * @return bool Whether the query is the main query.
 	 */