Update animated_digit.0.dart

!!!!!
diff --git a/examples/api/lib/animation/animation_controller/animated_digit.0.dart b/examples/api/lib/animation/animation_controller/animated_digit.0.dart
index ea416c7..76f9979 100644
--- a/examples/api/lib/animation/animation_controller/animated_digit.0.dart
+++ b/examples/api/lib/animation/animation_controller/animated_digit.0.dart
@@ -4,7 +4,7 @@
 
 import 'package:flutter/material.dart';
 
-/// An example of [AnimationController] and [SlideTransition]!!!!
+/// An example of [AnimationController] and [SlideTransition]!!!!!
 
 // Occupies the same width as the widest single digit used by AnimatedDigit.
 //