Update index.yml

Author: laujan

articles/ai-services/index.yml

@@ -88,7 +88,7 @@ productDirectory:
       url: ./language-service/index.yml
     # Card
     - title: Content Understanding
-      imageSrc: ~/reusable-content/ce-skilling/azure/media/ai-services/video-indexer.svg
+      imageSrc: ~/reusable-content/ce-skilling/azure/media/ai-services/content-understanding.svg
       summary: Transform multimodal data into task-specific insights.
       url: ./content-understanding/index.yml
      # Card