[math-on-web] a11y TF meeting time doodle

Hi everyone,

As discussed on the last CG meeting, we are revisiting the time for the
bi-weekly accessibility task force meetings -- the meeting time in the
European morning did not work for people in the Americas.

I've created a doodle at http://doodle.com/poll/thet5z95ksdve73x.

It's set up to ask you next Monday but please take it to mean "all
bi-weekly meetings".

Please note that the task force meeting is a work meeting. If you primarily
seek updates on the results of the task force, the regular meetings should
be sufficient.

Best,
Peter.