[COMMITTERS] Add new committers agreed at today's TC meeting
[COMMITTERS] Add new committers agreed at today's TC meeting

In its meeting today, the OpenTitan Technical Committee took into
account the considerations described in
<https://docs.opentitan.org/doc/project/committers/> and voted to add
the additional committers listed in this patch.

Signed-off-by: Alex Bradbury <ed4b35f7901fdce94913288395fdd0b59e44c43e@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan