Update CHANGELOG.md for 4.1.2 release

Author: georgeajit

CHANGELOG.md

@@ -1,5 +1,12 @@
 # CHANGELOG
 
+## 4.1.2
+#### New Functionality
+- [#995](https://github.com/marklogic/java-client-api/issues/995) - Support for Kerberos keytab file to authenticate 
+
+#### Improvements and Bug Fixes
+- [#1020](https://github.com/marklogic/java-client-api/issues/1020) - Provide missing DatabaseClientFactory Bean configuration  
+
 ## 4.1.1
 #### New Functionality
 - [#1006](https://github.com/marklogic/java-client-api/issues/1006) - Data Services First - MarkLogic's support for microservices