fixed redirection

Author: bandersmsft

articles/cost-management-billing/.openpublishing.redirection.cost-management-billing.json

@@ -206,12 +206,12 @@
             "redirect_document_id": true
         },
         {
-            "source_path_from_root": "/articles/billing/billing-enterprise-rest-apis.md",
+            "source_path_from_root": "/articles/billing/billing-ea-portal-rest-apis.md",
             "redirect_url": "/azure/cost-management-billing/manage/enterprise-rest-apis",
             "redirect_document_id": false
         },
         {
-            "source_path_from_root": "/articles/cost-management-billing/manage/enterprise-rest-apis.md",
+            "source_path_from_root": "/articles/cost-management-billing/manage/ea-portal-rest-apis.md",
             "redirect_url": "/azure/cost-management-billing/manage/enterprise-rest-apis",
             "redirect_document_id": true
         },