[release-1.27] add 1.25 EOL announcement (#16818)

* add 1.25 EOL announcement

* Update content/en/news/support/announcing-1.25-eol/index.md

Co-authored-by: Daniel Hawton <daniel@hawton.org>

---------

Co-authored-by: Mike Morris <1149913+mikemorris@users.noreply.github.com>
Co-authored-by: Mike Morris <mikemorris@users.noreply.github.com>
Co-authored-by: Daniel Hawton <daniel@hawton.org>

Author: 3 people

content/en/news/support/announcing-1.25-eol/index.md

@@ -0,0 +1,12 @@
+---
+title: Support for Istio 1.25 ends on September 22, 2025
+subtitle: Support Announcement
+description: Upcoming Istio 1.25 end of life announcement.
+publishdate: 2025-08-22
+---
+
+According to Istio's [support policy](/docs/releases/supported-releases#support-policy), minor releases like 1.25 are supported until six weeks after the N+2 minor release (1.27 in this case). [Istio 1.27 was released on August 11th, 2025](/news/releases/1.27.x/announcing-1.27/), and support for 1.25 will end on September 22nd, 2025.
+
+At that point we will stop back-porting fixes for security issues and critical bugs to 1.25, so we encourage you to upgrade to the latest version of Istio ({{<istio_release_name>}}). If you don't do this you may put yourself in the position of having to do a major upgrade on a short timeframe to pick up a critical fix.
+
+We care about you and your clusters, so please be kind to yourself and upgrade.