Update Changelog for 9.3.0.x with the security fixes (#601)

Author: RamSubbarao

CHANGELOG.md

@@ -1,10 +1,16 @@
 # Change log
 
-# 9.3.0.16-LTS (2024-02)
+## 9.3.0.16-LTS (2024-02)
 
 * Updated to MQ version 9.3.0.16
 
-# 9.3.0.15-LTS (2024-01)
+### Security Fixes
+* golang.org/x/crypto library has been upgraded to remediate CVE-2023-48795 vulnerability.
+* More secure sha512 algorithm will be used instead of sha256 to create self signed Certificate in the Web keystore.
+* The MQ container generates a PKCS#12 key store for use with the MQ web server.This keystore is generated using a legacy SHA-1 encryption,container code has been updated to use Pkcs12.Modern.Encode function which uses SHA-2 encryption.
+* Vulnerability has been reported on PathTraversal method usages which now have been fixed.
+
+## 9.3.0.15-LTS (2024-01)
 
 * Updated to MQ version 9.3.0.15