Added author attribute

Author: GraemeMalcolm

learn-pr/wwl-data-ai/ai-knowldge-mining/4-ai-skills.yml

@@ -4,6 +4,7 @@ title: Enrich extracted data with AI skills
 metadata:
   title: Enrich extracted data with AI skills
   description: Use AU skills to enrich data in your index.
+  author: graememalcolm
   ms.author: gmalc
   ms.date: 05/16/2025
   ms.topic: unit