content: change 7years author to "The Go Team"

The email address appears to be required but unused.

Change-Id: Ifafa4fc22b8f33ef68357db5924ee98111549697
Reviewed-on: https://go-review.googlesource.com/33024
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/content/7years.article b/content/7years.article
index 8c7f545..ffc43e7 100644
--- a/content/7years.article
+++ b/content/7years.article
@@ -1,7 +1,7 @@
 Seven years of Go
 10 Nov 2016
 
-Russ Cox
+The Go Team
 rsc@golang.org
 
 * Seven years of Go