Opta Digital Exp. SKUs

To make the Opta Digital Expansions searchable through SKU we need to add the SKUs in the product.md here

Author: jhansson-ard

content/hardware/07.opta/opta-family/opta-digital-exp/product.md

@@ -8,6 +8,7 @@ secondary_button_url: /tutorials/opta/opta-expansions-plc-ide
 secondary_button_title: Digital Expansions with PLC IDE
 core: arduino:mbed_opta
 certifications: [FCC, CE, UKCA]
+sku: [AFX00005, AFX00006]
 ---
 
-The **Arduino Opta® Digital Expansion** is a plug-and-play extension to the **Opta® PLC Controller** that expands its capabilities with more inputs and outputs. Two variants are available: the AFX00005 - Opta Ext D1608E (with Electromechanical Relays) and the AFX00006 - Opta Ext D1608S (with Solid State Relays), both of them fully compatible with the Arduino Ecosystem.
+The **Arduino Opta® Digital Expansion** is a plug-and-play extension to the **Opta® PLC Controller** that expands its capabilities with more inputs and outputs. Two variants are available: the AFX00005 - Opta Ext D1608E (with Electromechanical Relays) and the AFX00006 - Opta Ext D1608S (with Solid State Relays), both of them fully compatible with the Arduino Ecosystem.