Fix metadata.

Author: Sherry Yang

learn-pr/wwl-data-ai/get-started-computer-vision-azure/3-image-service.yml

@@ -1,5 +1,5 @@
 ### YamlMime:ModuleUnit
-uid: learn.wwl.get-started-computer-vision.azure-ai-vision
+uid: learn.wwl.get-started-computer-vision.image-service
 title: Understand Azure AI Vision Image Analysis capabilities
 metadata:
   title: Understand Azure AI Vision Image Analysis capabilities

learn-pr/wwl-data-ai/get-started-computer-vision-azure/4-face-service.yml

@@ -1,5 +1,5 @@
 ### YamlMime:ModuleUnit
-uid: learn.wwl.get-started-computer-vision.azure-ai-vision
+uid: learn.wwl.get-started-computer-vision.face-service
 title: Understand Azure AI Vision's Face service capabilities
 metadata:
   title: Understand Azure AI Vision's Face service capabilities