[aravis] gst: fix example pipeline

[Emmanuel Pacaud <emmanuel src gnome org>]

commit a2396b699cb6139b7e801474d0a13b889b6cd7eb
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Mon Apr 14 09:52:37 2014 +0200

    gst: fix example pipeline

 gst/gstaravis.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gst/gstaravis.c b/gst/gstaravis.c
index ffc0d75..8079088 100644
--- a/gst/gstaravis.c
+++ b/gst/gstaravis.c
@@ -28,7 +28,7 @@
  * <refsect2>
  * <title>Example launch line</title>
  * |[
- * gst-launch -v aravissrc ! video/x-raw-yuv,width=512,height=512,framerate=25/1 ! autovideosink
+ * gst-launch -v aravissrc ! video/x-raw,format=UYVY,width=512,height=512,framerate=25/1 ! autovideosink
  * ]|
  * </refsect2>
  */