Updating file name as per review comments

Author: pvrk

articles/backup/toc.yml

@@ -217,7 +217,7 @@
     - name: Create Recovery Services vault
       href: backup-azure-arm-userestapi-createorupdatevault.md
     - name: Update Recovery Services vault configurations
-      href: backup-azure-arm-userestapi-updatersvaultproperties.md
+      href: use-restapi-update-vault-properties.md
     - name: Create and update backup policy
       href: backup-azure-arm-userestapi-createorupdatepolicy.md
     - name: Back up Azure VMs