shorten animation to work around fiddlecli bug

longer animation for SkImage::makeFromFilter
example breaks fiddlecli.

TBR=jcgregorio@google.com
NOTRY=true
Docs-Preview: https://skia.org/?cl=156183
Bug: skia:
Change-Id: I512e982bbaf7fb3e4c58706b4d7e416f4ceac294
Reviewed-on: https://skia-review.googlesource.com/156183
Commit-Queue: Cary Clark <caryclark@skia.org>
Auto-Submit: Cary Clark <caryclark@skia.org>
Reviewed-by: Cary Clark <caryclark@skia.org>
diff --git a/docs/SkImage_Reference.bmh b/docs/SkImage_Reference.bmh
index 27aa625..ddbc5a8 100644
--- a/docs/SkImage_Reference.bmh
+++ b/docs/SkImage_Reference.bmh
@@ -2001,6 +2001,7 @@
 
 #Return filtered Image, or nullptr ##
 
+# Duration 5 breaks fiddlecli
 #Example
 #Description
 In each frame of the animation, filtered Image is drawn in a different location.
@@ -2008,7 +2009,7 @@
 ##
 #Image 5
 #Platform gpu
-#Duration 5
+#Duration 1
     sk_sp<SkImageFilter> shadowFilter = SkDropShadowImageFilter::Make(
                 -10.0f * frame, 5.0f * frame, 3.0f, 3.0f, SK_ColorBLUE,
                 SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,