BULK EDP Fix broken link in toc.yml

Per User Story https://dev.azure.com/msft-skilling/Content/_workitems/edit/436781

Author: v-thepet

articles/healthcare-apis/deidentification/toc.yml

@@ -60,7 +60,7 @@ items:
       - name: REST API
         href: /rest/api/healthdata
       - name: .NET SDK
-        href: /dotnet/api/overview/azure/healthdeidentification
+        href: /dotnet/api/overview/azure/health.deidentification-readme
       - name: Python SDK
         href: /python/api/overview/azure/health-deidentification
       - name: Java SDK