Add title to newsletter signup page.

[microbit-robert]

Add title to the following page if possible?

https://microbit.us14.list-manage.com/subscribe?u=e1c30f24b90ff3d70275cfff2&id=25403c7650

Originally posted by @microbit-carlos in #367 (comment)

[carlosperate]

@microbit-mark who else has access to MailChimp that would be the best person to do this kind of thing?