add missing documentation to whats new and changelog for 1.11.3 with …

…support of Ubuntu 22.04 OS

(cherry picked from commit f471ca1)
Signed-off-by: Ariel Kass <arielk@il.ibm.com>

docs/content/release_notes/changelog_1.11.3.md

@@ -5,3 +5,4 @@ Version 1.11.3 resolved the following issue:
 |Ticket ID|Severity|Description|
 |---------|--------|-----------|
 |**CSI-5716**|High|Cannot install CSI 1.11.2 on OCP 4.13|
+|**CSI-5706**|Low|Support Ubuntu 22.04 OS|

docs/content/release_notes/whats_new.md

@@ -8,6 +8,10 @@ IBM® block storage CSI driver 1.11.4 is a minor release that adds support for R
 
 This version extends support to orchestration platform Red Hat® OpenShift® 4.16 and 4.17, suitable for deployment of the CSI (Container Storage Interface) driver.
 
+## Supported operating systems
+
+This version now supports the Ubuntu 22.04.x LTS operating system (on Kubernetes cluster nodes only).
+
 ## Miscellaneous resolved issues
 
 For information about the resolved issues in version 1.11.4, see [1.11.4 (Sep 2024)](changelog_1.11.4.md).