[static-web] wiki: Fix typo on strikethough class

[Tom Tryfonidis <tomtryf src gnome org>]

commit 4dccdfd88ef4837ecf1ab1f3a91788e54ebb0720
Author: Tom Tryfonidis <tomtryf gnome org>
Date:   Tue May 16 13:51:05 2017 +0300

    wiki: Fix typo on strikethough class

 wiki.gnome.org/gnome-responsive/css/style.css |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/wiki.gnome.org/gnome-responsive/css/style.css b/wiki.gnome.org/gnome-responsive/css/style.css
index d28f798..dee8e4f 100644
--- a/wiki.gnome.org/gnome-responsive/css/style.css
+++ b/wiki.gnome.org/gnome-responsive/css/style.css
@@ -312,5 +312,5 @@ div#preview {
 }
 
 .strike {
-    text-decoration: line-tough;
+    text-decoration: line-through;
 }