Update prepare-setup.md (#43)

Migrated tenancy from natdsecurity to c4u02 for this object hence the link has changed. Updating the link

Signed-off-by: Abhinav Jain <[email protected]>

backup-recovery/prepare-setup/prepare-setup.md

@@ -15,7 +15,7 @@ This lab will show you how to download the Oracle Resource Manager (ORM) stack z
 ## Task 1: Download Oracle Resource Manager (ORM) stack zip file
 
 1.  Click on the link below to download the Resource Manager zip file you need to build your environment:
-    - [db21c-dbae-mkplc-freetier.zip](https://objectstorage.us-ashburn-1.oraclecloud.com/p/ZdyeiKou7tdfayF1zF1NmPtpUGFTvKjSY5SC46H8NBNlPAxtOWmZJUDsWoeFHQJF/n/natdsecurity/b/stack/o/db21c-dbae-mkplc-freetier.zip)
+    - [db21c-dbae-mkplc-freetier.zip](https://objectstorage.us-ashburn-1.oraclecloud.com/p/jp-H9yF7Ryb-wk6tPibxVxiBpEO-XXQja8pbbJMQ1dD3OMrl-IIPPIRPPOu2PKwr/n/c4u02/b/hosted_workshops/o/stacks/db21c-dbae-mkplc-freetier.zip)
 
 2.  Save in your downloads folder.