`class="caption"` missing in sphinx doc nav
Left: http://osr-cesbio.ups-tlse.fr/oso/donneeswww_TheiaOSO/iota2_documentation/master/index.html
Right: https://docs.iota2.net/
Left:
<p><span class="caption-text">Getting started:</span></p>
Right:
<p class="caption"><span class="caption-text">Getting started:</span></p>
There is a missing class="caption"
in the osr-cesbio version of the doc. I have to investigate where it's coming from.