Add release v1.6.1 to README

UPDATED LINK

Author: HolgerKache

README.md

@@ -27,7 +27,7 @@ Spark Version | Release # | Binary Location
 1.4.1 | v1.4.1.3 | [Location] (https://github.com/cloudant/spark-cloudant/releases/download/v1.4.1.3/cloudant-spark.jar)
 1.4.1 | v1.4.1.4 | [Location] (https://github.com/cloudant-labs/spark-cloudant/releases/download/v1.4.1.4/cloudant-spark-1.4.1.jar)
 1.4.1 | v1.4.1.5 | [Location] (https://github.com/cloudant-labs/spark-cloudant/releases/download/v1.4.1.5/cloudant-spark.jar)
-1.6.1 | v1.6.1.0 | [Location] (https://github.com/cloudant-labs/spark-cloudant/releases/download/v1.6.1/cloudant-spark-v1.6.1-35.jar)
+1.6.1 | v1.6.1.0 | [Location] (https://github.com/cloudant-labs/spark-cloudant/releases/download/v1.6.1/cloudant-spark-v1.6.1-40.jar)
 
 
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