[Intl] Update the ICU data to 73.1

Author: jderusse

Tests/Constraints/TimezoneValidatorTest.php

@@ -73,7 +73,7 @@ public static function getValidTimezones(): iterable
         yield ['EST5EDT'];
         yield ['MST7MDT'];
         yield ['PST8PDT'];
-        yield ['America/Montreal'];
+        yield ['America/Toronto'];
 
         // previously expired in ICU
         yield ['Europe/Saratov'];