content/subtests: fix date

Change-Id: I8697175cc59480425d8b192d121a7683b70c1b30
Reviewed-on: https://go-review.googlesource.com/30139
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
diff --git a/content/subtests.article b/content/subtests.article
index 039ff74..7edbc78 100644
--- a/content/subtests.article
+++ b/content/subtests.article
@@ -1,5 +1,5 @@
 Using Subtests and Sub-benchmarks
-23 Aug 2016
+03 Oct 2016
 Tags: testing, hierarchy, table-driven, subtests, sub-benchmarks
 
 Marcel van Lohuizen