feat: modify caution block position

[Yves-Jacq]

Move the "caution" block at the bottom of the page and rewrite the content of this block

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}