Update README.md

Author: hisacat

Images/Preview.png

@@ -8,7 +8,8 @@
 [shields-release]: https://img.shields.io/github/v/release/hisacat/Unity-NumberCounterShader
 [github-release]: https://github.com/hisacat/Unity-NumberCounterShader/releases/latest
 
-これはUnityで数字を表示するためのシンプルなシェーダーです。
+これはUnityで数字を表示するためのシンプルなシェーダーです。  
+![Preview](./Images/Preview.png)
 
 - 最大6桁の数字を表示可能
 - パフォーマンスを最適化した軽量シェーダー

README.ja.md

@@ -8,7 +8,8 @@
 [shields-release]: https://img.shields.io/github/v/release/hisacat/Unity-NumberCounterShader
 [github-release]: https://github.com/hisacat/Unity-NumberCounterShader/releases/latest
 
-이것은 숫자를 표시하기 위한 간단한 Unity용 Shader 입니다.
+이것은 숫자를 표시하기 위한 간단한 Unity용 Shader 입니다.  
+![Preview](./Images/Preview.png)
 
 - 최대 6자리의 숫자를 표시 가능
 - 직접 작성된 쉐이더로 매우 가벼움

README.ko.md

@@ -8,7 +8,8 @@ This document is also available in other languages:
 [shields-release]: https://img.shields.io/github/v/release/hisacat/Unity-NumberCounterShader
 [github-release]: https://github.com/hisacat/Unity-NumberCounterShader/releases/latest
 
-This is a simple shader for displaying numbers in Unity.
+This is a simple shader for displaying numbers in Unity.  
+![Preview](./Images/Preview.png)
 
 - Displays up to 6 digits
 - Lightweight shader with optimized performance