Coding Standards: Correct DateTimeZone class name in `WP_Customize_…

…Date_Time_Control::get_timezone_info()`.

Follow-up to [41626].

See #53359.

git-svn-id: https://develop.svn.wordpress.org/trunk@51534 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/customize/class-wp-customize-date-time-control.php

@@ -227,7 +227,7 @@ public function get_timezone_info() {
 
 		if ( $tz_string ) {
 			try {
-				$tz = new DateTimezone( $tz_string );
+				$tz = new DateTimeZone( $tz_string );
 			} catch ( Exception $e ) {
 				$tz = '';
 			}