Update release-notes-v18.4.1.md

Author: Andriciuc

docs/release-notes/release-notes-v18.4.1.md

@@ -6,11 +6,15 @@ This release of Percona Distribution for PostgreSQL is based on Percona Server f
 
 ## Release Highlights
 
-This release continues to deliver Percona’s open source value-add components for enterprise use cases, including `pg_stat_monitor` 2.3.2 for advanced query-level observability, `pg_tde` 2.1.2 for Transparent Data Encryption and more. See the full component list below for details.
+This release continues to deliver Percona’s open source value-add components for enterprise use cases, `pg_tde` 2.2.0 for Transparent Data Encryption and more. See the full component list below for details.
 
 !!! note
     To upgrade from earlier versions (e.g. Percona Distribution for PostgreSQL 17.x), follow the steps in [Upgrading Percona Distribution for PostgreSQL](../major-upgrade.md).
 
+### Ubuntu 26.04 LTS support added
+
+ Starting Q2 2026, Percona Distribution for PostgreSQL is available on Ubuntu 26.04 LTS (Noble Numbat's successor). Packages are provided for AMD64 and ARM64 architectures.
+
 ### Tarball updates
 
 The binary tarballs for x86_64 and ARM64 architectures have been updated in this release. The following libraries and components have new versions:
@@ -34,7 +38,7 @@ See [Install Percona Distribution for PostgreSQL from binary tarballs](../tarbal
 
 ### Addressed CVEs
 
-This release includes important security measures that address the following CVEs: CVE-2026-2003, CVE-2026-2004, CVE-2026-2005, CVE-2026-2006, CVE-2026-2007. For more details, see the [PostgreSQL 18.3 release notes](https://www.postgresql.org/docs/18/release-18-3.html) and the [PostgreSQL 18.2 release notes](https://www.postgresql.org/docs/18/release-18-2.html).
+This release includes important security measures that address the following CVEs: TBD. For more details, see the [PostgreSQL 18.4 release notes](https://www.postgresql.org/docs/18/release-18-4.html).
 
 ## Known Issues