relative link fix

Author: shellyhaverkamp

articles/healthcare-apis/azure-api-for-fhir/index.yml

@@ -28,7 +28,7 @@ landingContent:
       - linkListType: how-to-guide
         links:
           - text: Migrate to Azure Health Data Services
-            url: ../fhir/migration-strategies.md
+           url: ../../fhir/migration-strategies.md
 
   - title: Access Azure API for FHIR
     linkLists: