docs: Add supported Kubernetes versions

Author: Techassi

modules/ROOT/partials/release-notes/release-25.11.adoc

@@ -441,3 +441,16 @@ Information on how to browse the registry can be found xref:contributor:project-
 * Open Policy Agent: https://github.com/stackabletech/docker-images/issues/1238[1.0.1]
 * Trino: https://github.com/stackabletech/docker-images/issues/1242[470]
 * Vector: https://github.com/stackabletech/docker-images/issues/1233[0.47.0]
+
+===== Kubernetes versions
+
+This release supports the following Kubernetes versions:
+
+* `1.34`
+* `1.33`
+* `1.32`
+* `1.31`
+
+These Kubernetes versions are no longer supported:
+
+* `1.30`