The current CI indeed checks the documentation build and tutorials as part of the process. The CI images can be found here tvm/Jenkinsfile at main · apache/tvm · GitHub , you can use
docker/bash.sh ci_gpu
to quickly start the env used to build the documentation(although GPU is needed to build the tutorials because we need to run them).
Building everything along with running the tutorials can be slow, to quickly build the docs without running the tutorials, follow instructions here tvm/docs at main · apache/tvm · GitHub
./tests/scripts/task_sphinx_precheck.sh