Added product code

Author: BenjaminDannegard

content/hardware/04.pro/shields/portenta-uwb-shield/product.md

@@ -7,7 +7,7 @@ primary_button_title: Get Started
 core: arduino:mbed_portenta
 forumCategorySlug: '/hardware/'
 certifications: [CE, FCC, UKCA, ROHS, REACH, WEEE]
-productCode: ''
+productCode: '213'
 sku: [ASX00074]
 ---