Adding updates to CHANGELOG.md for 3.2.0 release.

Author: anu3990

CHANGELOG.md

@@ -1,5 +1,18 @@
 # CHANGELOG
 
+## 3.2.0
+#### New Functionality
+
+- Can now set expiration duration for MarkLogic Cloud access-token.
+
+#### Improvements and Bug Fixes
+
+- Fix for security vulnerabilities - 
+    https://github.com/advisories/GHSA-4q6p-r6v2-jvc5, 
+    https://github.com/advisories/GHSA-c2qf-rxjj-qqgw and
+    https://github.com/advisories/GHSA-7fh5-64p2-3v2j
+
+
 ## 3.1.0
 #### New Functionality