about updating the build number after being rooted

Hello
This is a noob question.
I just recently rooted my milestone with build SHOLs_U2_02.31.0
But I noticed that they released a new Build that is 02.36.0

What should I do if a want to get the new build with my currently rooted phone.

Thanks for your time.

Just do the same you did with build 02.36.0 as you did with build 02.31.0.