docs: Fix naming of drag- and tap-callbacks examples (#2873)

Fix naming of drag- and tap-callbacks examples

examples/lib/stories/input/overlapping_tap_callbacks_example.dart

@@ -0,0 +1,44 @@
+import 'package:flame/components.dart';
+import 'package:flame/events.dart';
+import 'package:flame/extensions.dart';
+import 'package:flame/game.dart';
+import 'package:flutter/material.dart';
+
+class OverlappingTapCallbacksExample extends FlameGame {
+  static const String description = '''
+    In this example we show you that events can choose to continue propagating
+    to underlying components. The middle green square continue to propagate the
+    events, meanwhile the others do not.
+  ''';
+
+  @override
+  Future<void> onLoad() async {
+    add(TapCallbacksSquare(position: Vector2(100, 100)));
+    add(
+      TapCallbacksSquare(
+        position: Vector2(150, 150),
+        continuePropagation: true,
+      ),
+    );
+    add(TapCallbacksSquare(position: Vector2(100, 200)));
+  }
+}
+
+class TapCallbacksSquare extends RectangleComponent with TapCallbacks {
+  TapCallbacksSquare({Vector2? position, this.continuePropagation = false})
+      : super(
+          position: position ?? Vector2.all(100),
+          size: Vector2.all(100),
+          paint: continuePropagation
+              ? (Paint()..color = Colors.green.withOpacity(0.9))
+              : PaintExtension.random(withAlpha: 0.9, base: 100),
+        );
+
+  final bool continuePropagation;
+
+  @override
+  void onTapDown(TapDownEvent event) {
+    event.continuePropagation = continuePropagation;
+    angle += 1.0;
+  }
+}