DOCSP-35643 Correct Latest Release Version

Author: ianf-mongodb

source/release-notes.txt

@@ -10,7 +10,7 @@ Release Notes
    :depth: 1
    :class: twocols
 
-1.3.4 Changelog
+1.4.3 Changelog
 ---------------
 
 *Released December 11, 2023*
@@ -37,7 +37,7 @@ New features:
   .. note::
 
     Kafka is an open-source platform for distributed, 
-    high-availability workloads. To gain access to Relation Migrator 
+    high-availability workloads. To gain access to Relational Migrator 
     with Kafka support, contact your MongoDB account team to sign up 
     for the Kafka Early Access Program.