Broken link fixed

Author: atikmapari

articles/cognitive-services/Custom-Vision-Service/toc.yml

@@ -97,7 +97,7 @@ items:
     - name: Node.js - Prediction
       href: /javascript/api/@azure/cognitiveservices-customvision-prediction/
     - name: Python
-      href: /python/api/overview/azure/cognitiveservices/customvision
+      href: /python/api/azure-cognitiveservices-vision-customvision
     - name: Go - Training
       href: https://godoc.org/github.com/Azure/azure-sdk-for-go/services/cognitiveservices/v2.1/customvision/training
     - name: Go - Prediction
@@ -117,4 +117,4 @@ items:
   - name: Azure roadmap
     href: https://azure.microsoft.com/updates/?product=cognitive-services
   - name: Release Notes
-    href: release-notes.md
+    href: release-notes.md