[TWN team] later freeze

[harmony]

Hi,

I propose to freeze this week's TWN later than usual, at maybe 9PM UTC, 
in case Tor Browser 3.6.5 is released in that time.

I can't remember if we've ever caught a Tor Browser release by doing 
this, but I live in hope. Or if it's definitely coming out before 
12:00UTC tomorrow, I guess I could just write the thing and predict all 
of the hyperlinks.

Thanks!