Update release_notes.txt

Author: cangencer

hazelcast-jet-distribution/src/root/release_notes.txt

@@ -25,10 +25,15 @@ https://github.com/hazelcast/hazelcast-jet/issues/<issue number>
 
 ** Hazelcast Jet 4.1.1 **
 
-1. Fixes
+1. Enhancements 
+
+[docker] Update Java version to 11 in Docker image
+
+2. Fixes
 
 [core] JmsSink should not throw when it receives a Watermark
 
+
 ** Hazelcast Jet 4.1 **
 
 Members of the open source community that appear in these release notes: