another 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: https://learn.microsoft.com/azure/healthcare-apis/fhir/migration-strategies.md
+            url: ././fhir/migration-strategies.md
 
   - title: Access Azure API for FHIR
     linkLists:

articles/healthcare-apis/fhir/toc.yml

@@ -13,7 +13,7 @@ items:
   - name: Versioning policy and history management
     href: fhir-versioning-policy-and-history-management.md
   - name: Migration from Azure API for FHIR
-    href: migration-strategies.md
+    href: https://learn.microsoft.com/azure/healthcare-apis/fhir/migration-strategies
 - name: Quickstarts
   expanded: false
   items: