[gtk+] Fix another type in the css docs

[Matthias Clasen <matthiasc src gnome org>]

commit 9aceb34429d410cf8c61a6ee12920e9df14288a5
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 22 11:01:45 2016 -0700

    Fix another type in the css docs

 docs/reference/gtk/css-overview.xml |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/docs/reference/gtk/css-overview.xml b/docs/reference/gtk/css-overview.xml
index 7d8bb5a..a5bb29c 100644
--- a/docs/reference/gtk/css-overview.xml
+++ b/docs/reference/gtk/css-overview.xml
@@ -942,7 +942,7 @@ arrow {
     <para>
       To enable an animation, the name of the keyframes must be set as the value
       of the animation-name property. The details of the animation can modified
-      with the animation-time, animation-timing-function, animation-iteration-count
+      with the animation-duration, animation-timing-function, animation-iteration-count
       and other animation properties.
     </para>
 
@@ -955,7 +955,7 @@ arrow {
 
 spinner {
   animation-name: spin;
-  animation-time: 1s;
+  animation-duration: 1s;
   animation-timing-function: linear;
   animation-iteration-count: infinite;
 }