Is CHT master have version 3.13?

Thanks,
That helps, but each time I create container(s) it uses the image specified in docker-compose
medicmobile/medic-os:cht-3.9.0-rc.2

I am assuming this is why I get 3.9
Is the medic-os image built to/with cht-3.13.x ?

I looked at
Upgrading CHT Core from 3.6.0 to 3.9.0 using medic-OS - Technical Support - Community Health Toolkit
So it is unclear whether it is simple as using a new image?

Jim