potential fix to build and docs synchronization error

[Abhiram824]

What this does

When building it looks like documentation pages have an error where the built docs are not the same as what is displayed on the website. For example, the webpage https://robosuite.ai/docs/simulation/device.html is empty despite the https://github.com/ARISE-Initiative/robosuite/blob/master/docs/simulation/device.rst having more information. I suspect this is due to the fact the built docs are being synchronized with the its parent directory: https://github.com/ARISE-Initiative/robosuite/blob/master/.github/workflows/update-docs.yaml#L44

I have updated the workflow to circumvent this issue, but I am not 100% sure if this is the cause/the changes I made are the solution (can't fully test locally).

How it was tested

Was able to replicate the error by running rsync -av --delete docs/_build/html/ docs/ and then bundle exec jekyll serve after building the docs and checking out to the gh_pages branch. I believe this is what the workflow does under hood.

[kevin-thankyou-lin]

Awesome, changes look good to me.

[abhihjoshi]

I think we may need to import hidapi to get the spacemouse related docs, that could be messing up the rest of the devices on this page.