hub category update

Author: Phil Meadows

articles/iot-fundamentals/index.yml

@@ -41,7 +41,7 @@ highlightedContent:
       url: https://docs.microsoft.com/learn/browse/?products=azure&term=iot
     # Card
     - title: Support and help options
-      itemType: learn
+      itemType: how-to-guide
       url: ../iot-fundamentals/iot-support-help.md
 
 # conceptualContent section