Update schedule

I have some vague stuff about messaging patterns sketched out somewhere :)

Author: jonathanstowe

misc/perl6advent-2017/schedule

@@ -16,7 +16,7 @@ Please add your topic and name after each day that you plan to take.
 14: albastev: "Tackling a big Grammar in Perl 6"
 15:
 16:
-17:
+17: RabidGravy: "Something About Messaging"
 18: nige: "Perl 6 powered workflow"
 19:
 20: