Added missing icons for dynamic spark plugins

Author: Bhooshan Mogal

README.md

@@ -12,6 +12,7 @@ Dyanmic Spark plugins allow writing and executing arbitrary Spark code written i
 
 * [Scala Spark Compute](docs/ScalaSparkCompute-sparkcompute.md)
 * [Scala Spark Program](docs/ScalaSparkProgram-sparkprogram.md)
+* [Scala Spark Sink](docs/ScalaSparkSink-sparksink.md)
 * [Python Spark Program](docs/PySparkProgram-sparkprogram.md)
 
 Build