How do I get 13.0.1RC1.11 update to my server?

The MOH issue has been resolved in 13.0.1RC1.11. I don’t know how to get the latest (fixed) release.
Can someone provide the instructions to accomplish this. I have not found the process in the documentation.
Thanks for the help on a simple but frustrating problem.

Many thanks for the pointer. Update done and many issues resolved. Some still remain. I will post them when I can better describe my conditions, tests, and results. Thanks again for the pointer.