Updated registration

I updated the registration to clarify it is now an online workshop

Not sure what a reasonable remote limitation is, figure 80 may be more
manageable if we want to moderate and unmute people. It is somewhat an
arbitrary number and what we had earlier for physical.

https://www.w3.org/2002/09/wbs/1/maps2020/

-- 
Ted Guild <ted@w3.org>
W3C Automotive Lead
https://www.w3.org/auto