Fix return annotation.

Signed-off-by: costdev <79332690+costdev@users.noreply.github.com>

Author: costdev

inc/updater/namespace.php

@@ -204,7 +204,7 @@ function get_trusted_keys(): array {
  * @param string      $remote_source Path of $remote_source.
  * @param WP_Upgrader $upgrader      An Upgrader object.
  * @param array       $hook_extra    Array of hook data.
- * @return string|WP_Error The correct directory path for installation, or WP_Error on failure.
+ * @return string The correct directory path for installation.
  */
 function move_package_during_install( $source, $remote_source, $upgrader, $hook_extra ): string {
 	global $wp_filesystem;