Simon Ser authored Nov 16, 2021 and Pekka Paalanen committed Nov 16, 2021

The doc website is currently hidden in the Wayland homepage. Add
an explicit link in the README.

While at it, rename the section about documentation. "Weston" is
already in the repository name and the top oif the README, so no
need to repeat here.

Signed-off-by: Simon Ser <contact@emersion.fr>