Updated abstract for TC BoF

Hi,

We've had a bit of a rethink about how the Technical Committee BoF 
should work (in particular, to make it a bit more interactive), so would 
it be possible to update the abstract on the schedule, please? To:

"An opportunity to meet the members of the Debian Technical Committee 
who are in attendance at DebConf, learn about the work of the Technical 
Committee, and give us your feedback about things you think we could do 
differently."

Thanks,

Matthew