[infra] Fix lottie-ci bots to use the correct asset name

Broken in https://skia-review.googlesource.com/c/skia/+/276641

Change-Id: I0ba616c5b117a2deed3b7d47b2b1b659d6914e1b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/278458
Reviewed-by: Eric Boren <borenet@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
diff --git a/infra/bots/gen_tasks_logic/dm_flags.go b/infra/bots/gen_tasks_logic/dm_flags.go
index aec61a6..8dadbc8 100644
--- a/infra/bots/gen_tasks_logic/dm_flags.go
+++ b/infra/bots/gen_tasks_logic/dm_flags.go
@@ -989,7 +989,7 @@
 
 	// Add properties indicating which assets the task should use.
 	if b.matchExtraConfig("Lottie") {
-		b.asset("lottie")
+		b.asset("lottie-samples")
 		b.recipeProp("lotties", "true")
 	} else {
 		b.asset("skimage")