Update changelog

Author: milindl

CHANGELOG.md

@@ -4,7 +4,7 @@ v1.4.0 is a feature release. It is supported for all usage.
 
 ## Enhancements
 
-1. Adds support for `highWatermark`, `offsetLag()`, and `offsetLagLow()` in `eachBatch` callback (#).
+1. Adds support for `highWatermark`, `offsetLag()`, and `offsetLagLow()` in `eachBatch` callback (#317).
 
 
 # confluent-kafka-javascript v1.3.0