Update content/hacking/01.software/PortManipulation/content.md

Author: karlsoderby

content/hacking/01.software/PortManipulation/content.md

@@ -1,6 +1,7 @@
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 title: "Arduino - PortManipulation"
 source: "https://arduino.cc/en/Reference/PortManipulation"
+description: Learn how to control pins on an Arduino through three different registers (DDR, PORT, PIN). 
 ---
 
 ## Port Registers