Add submission # 4270

#4270

Author: ArduinoBot

registry.txt

@@ -6913,3 +6913,4 @@ https://github.com/ApogeoSpace/ApogeoNode.git|Contributed|APSNode
 https://github.com/MOMIZICH/PBEnhancer.git|Contributed|PBEnhancer
 https://github.com/arduino-libraries/Arduino_SerialUpdater.git|Arduino|Arduino_SerialUpdater
 https://github.com/arduino-libraries/Arduino_Opta_Blueprint.git|Arduino|Arduino_Opta_Blueprint
+https://github.com/orkungedik/kmeans.git|Contributed|kMeans