Correct brand color.

Author: IEvangelist

articles/cognitive-services/index.yml

@@ -2,12 +2,13 @@
 
 title: Azure Cognitive Services documentation
 summary: Learn how to build intelligent and supported algorithms into apps, websites, and bots to see, hear, speak, understand, and interpret your user needs.
+brand: azure
+
 metadata:
   title: Azure Cognitive Services documentation
   description: Learn how to build intelligent and supported algorithms into apps, websites, and bots to see, hear, speak, understand, and interpret your user needs.
   ms.service: cognitive-services
   ms.topic: hub-page
-  brand: azure
   author: nitinme
   ms.author: nitinme
   manager: nitinme