Add missing changelog entry for 1.14.2 (#479)

Author: iquintero

CHANGELOG.rst

@@ -14,6 +14,8 @@ CHANGELOG
 * build: upgrade docker-compose to 1.23
 * enhancement: Frameworks: update warning for not setting framework_version as we aren't planning a breaking change anymore
 * enhancement: Session: remove hardcoded 'training' from job status error message
+* bug-fix: Updated Cloudwatch namespace for metrics in TrainingJobsAnalytics
+
 
 1.14.1
 ======