Fix issue preventing stories shared element transition from starting.

app/src/main/java/org/thoughtcrime/securesms/stories/viewer/reply/StoriesSharedElementCrossFaderView.kt

@@ -140,7 +140,7 @@ class StoriesSharedElementCrossFaderView @JvmOverloads constructor(
       .centerCrop()
       .into(targetView)
 
-    GlideApp.with(sourceBlurView).clear(sourceBlurView)
+    GlideApp.with(targetBlurView).clear(targetBlurView)
     isTargetBlurReady = true
   }