nipype.readthedocs.io side bar not interactive

[shawnrhoads]

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Summary

Somewhat of a minor issue, but the side bar for the documentation website is not interactive (i.e., the search bar doesn't work, and the links are not clickable).

Reproduced this issue on Chrome 92.0.4515.131 and Firefox 90.0.2.

https://nipype.readthedocs.io/en/latest/index.html	https://nipype.readthedocs.io/en/latest/quickstart.html