docs: Add slightly more details to release hightlight

Author: Techassi

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

@@ -7,7 +7,7 @@ Released on 2025-11-07.
 [TIP,caption=Release highlights]
 ====
 * The Stackable platform now provides an operator for OpenSearch.
-* All operators now correctly handle multiple CA certificates.
+* All operators now correctly handle multiple Certificate Authorities, previously CA certificate rotations could cause broken product clusters.
 * The User Info Fetcher (UIF) is no longer marked as experimental.
 * SecretClass `v1alpha2` is now available:
 ** The custom `samAccountName` generation is no longer marked as experimental.