`build-docs` workflow failed

[yiheng-wang-nv]

The workflow failed in recent PRs such as: https://github.com/Project-MONAI/MONAI/actions/runs/3805194186/jobs/6472957035#step:7:243

[yiheng-wang-nv]

it may due to sphinx-build new release: https://www.sphinx-doc.org/en/master/changes.html#release-6-0-0-released-dec-29-2022

[wyli]

looks like the issue here pydata/pydata-sphinx-theme#1094 I'll update the workaround in #5794