content: fix 7years typo

Change-Id: Ie5f89b8763f473d38e9dc83e0793a9e161aa546d
Reviewed-on: https://go-review.googlesource.com/33023
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
diff --git a/content/7years.article b/content/7years.article
index e44bea2..8c7f545 100644
--- a/content/7years.article
+++ b/content/7years.article
@@ -30,7 +30,7 @@
 “stop the world” pauses to [[https://golang.org/design/17503-eliminate-rescan][under 100 microseconds]].
 (Contrast that with Go 1.5’s big news of [[https://blog.golang.org/go15gc][10 milliseconds or less]].)
 
-This year kicked off with the a global Go hackathon,
+This year kicked off with a global Go hackathon,
 the [[https://blog.golang.org/gophergala][Gopher Gala]], in January.
 Then there were [[https://golang.org/wiki/Conferences][Go conferences]] in India and Dubai in February,
 China and Japan in April, San Francisco in May, Denver in July,