Change SVN migration link

What does this MR do and why?

Change SVN migration link to the redirected one.

Screenshots or screen recordings

Before	After

How to set up and validate locally

Go to http://gdk.test:3000/help

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.