[canvaskit] Update GM:skottie_setcolor

After https://skia-review.googlesource.com/c/skia/+/313424, properties
are no longer namespaced.  Update to reflect the new naming.

Change-Id: Iee9d932e006773dac437d555aafbbba20cf9f702
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313424
Commit-Queue: Nathaniel Nifong <nifong@google.com>
Auto-Submit: Florin Malita <fmalita@chromium.org>
Reviewed-by: Nathaniel Nifong <nifong@google.com>
1 file changed