Merge branch '5.4' into 6.2

* 5.4:
  [HttpClient] fix proxied redirects in curl client
  [Intl] Update the ICU data to 73.1
  [Console] Restoring the ability to output unicode text to the Win10 console
  [Mailer] Add brifge documentation

Author: nicolas-grekas

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'];