Updated Ora2PG Cookbook document and the doc link

updated link for migration asset (Databases Ninja team) from GitHub to download center.

Author: ms-amsolo

articles/postgresql/migrate/how-to-migrate-from-oracle.md

@@ -348,7 +348,7 @@ For more information about this migration scenario, see the following resources.
 
 | Resource | Description    |
 | -------------- | ------------------ |
-| [Oracle to Azure PostgreSQL migration cookbook](https://github.com/Microsoft/DataMigrationTeam/blob/master/Whitepapers/Oracle%20to%20Azure%20PostgreSQL%20Migration%20Cookbook.pdf) | This document helps architects, consultants, database administrators, and related roles quickly migrate workloads from Oracle to Azure Database for PostgreSQL by using ora2pg. |
+| [Oracle to Azure PostgreSQL migration cookbook](https://www.microsoft.com/en-us/download/details.aspx?id=103473) | This document helps architects, consultants, database administrators, and related roles quickly migrate workloads from Oracle to Azure Database for PostgreSQL by using ora2pg. |
 | [Oracle to Azure PostgreSQL migration workarounds](https://github.com/Microsoft/DataMigrationTeam/blob/master/Whitepapers/Oracle%20to%20Azure%20Database%20for%20PostgreSQL%20Migration%20Workarounds.pdf) | This document helps architects, consultants, database administrators, and related roles quickly fix or work around issues while migrating workloads from Oracle to Azure Database for PostgreSQL. |
 | [Steps to install ora2pg on Windows or Linux](https://github.com/microsoft/DataMigrationTeam/blob/master/Whitepapers/Steps%20to%20Install%20ora2pg%20on%20Windows%20and%20Linux.pdf)                       | This document provides a quick installation guide for migrating schema and data from Oracle to Azure Database for PostgreSQL by using ora2pg on Windows or Linux. For more information, see the [ora2pg documentation](http://ora2pg.darold.net/documentation.html). |