Update releases.md with TZ 2025b (#159)

Author: flode

website/docs/releases.md

@@ -25,7 +25,9 @@ In case you are wondering why all our releases start with `0.0`, read [this FAQ
 :::
 
 ###  Upcoming Release
-
+* IANA released version 2025b of the Time Zone Database. Hyper’s time zone information is updated accordingly. Noteworthy changes:
+  * New zone America/Coyhaique
+  * Iran switched from +04 to +0330 on 1978-11-10 at 24:00, not at year end.
 
 ###  0.0.22106 [May 1 2025]