Image are not rendered on form reference

[lyrixx]

Hello.

On the following page https://symfony.com/doc/current/reference/forms/types/choice.html
all images are not rendered. It works well on <3.3

I tried to fix it, but I did not find the error.
For exemple, this file https://github.com/symfony/symfony-docs/blob/master/reference/forms/types/options/group_by.rst.inc contains .. image:: /_images/reference/form/choice-example5.png and the image do exist.

I don't know why it does not work :/

[xabbuh]

Unfortunately that's true. But I think we already cover that in #8677. Thank you Greg anyway. :)