Sitemaps: Add missing slash when calling home_url() for consistency.

Props Chouby.
Fixes #50570.

git-svn-id: https://develop.svn.wordpress.org/trunk@48472 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/sitemaps/sitemaps.php

@@ -234,7 +234,7 @@ class Test_Sitemaps extends WP_UnitTestCase {
 		array_unshift(
 			$expected,
 			array(
-				'loc' => home_url(),
+				'loc' => home_url( '/' ),
 			)
 		);