[gtk+] Fix a typo in the css docs

[Matthias Clasen <matthiasc src gnome org>]

commit c0048b426b49c2fa45711f2e05aa58ccb2276f97
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 22 10:58:34 2016 -0700

    Fix a typo in the css docs

 docs/reference/gtk/css-overview.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/docs/reference/gtk/css-overview.xml b/docs/reference/gtk/css-overview.xml
index 56cf845..7d8bb5a 100644
--- a/docs/reference/gtk/css-overview.xml
+++ b/docs/reference/gtk/css-overview.xml
@@ -949,7 +949,7 @@ arrow {
     <example>
       <title>A CSS animation</title>
       <programlisting><![CDATA[
-@keyrframes spin {
+@keyframes spin {
   to { -gtk-icon-transform: rotate(1turn); }
 }