Showing all of the client logos adds a considerable amount to the page
weight of the page. This change shows 6 random clients. It will be
re-generated each time the page is deployed, which might be OK for
now, although we could add timed pipeline to keep this fresh/fair.
This updates the number to be the same as it currently is on
coops.tech. There's a separate
issue (https://git.coop/cotech/website/issues/29) to populate this
from the YAML front matter in each file under `_coops`.
This updates the number to be the same as it is today on
coops.tech (the wordpress site). There's some extra work to do to make
this "dynamic" in https://git.coop/cotech/website/issues/73.
