talks: fix spello in State of Go 2016

Change-Id: I41a02f7fa7f198dbf59ccd868f56b26af54d0e2c
Reviewed-on: https://go-review.googlesource.com/19181
Reviewed-by: Francesc Campoy Flores <campoy@golang.org>
diff --git a/2016/state-of-go.slide b/2016/state-of-go.slide
index 571a025..f2787e7 100644
--- a/2016/state-of-go.slide
+++ b/2016/state-of-go.slide
@@ -134,7 +134,7 @@
 We can now have:
 
 - the result we expected
-- without sacrificing the readibility of our templates.
+- without sacrificing the readability of our templates.
 
 .play state-of-go/template/new.go /`/,/`/