Updated the date in README.md files.

Author: H3idi-X

README.md

@@ -112,5 +112,5 @@ The release history of Unity Toon Shader is [here.](./com.unity.toonshader/CHANG
 The release history of UTS2 is [here.](./com.unity.toonshader/Documentation~/en/UTS2_HISTORY_en.md) 
 
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-**README.md 2021/06/04**  
+**README.md 2021/06/14**  
 

com.unity.toonshader/Documentation~/en/README.md

@@ -111,5 +111,5 @@ The release history of Unity Toon Shader is [here.](../CHANGELOG.md)
 The release history of UTS2 is [here.](./UTS2_HISTORY_en.md)
 
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-**README.md 2021/06/04**  
+**README.md 2021/06/14**  
 

com.unity.toonshader/Documentation~/ja/README_ja.md

@@ -114,4 +114,4 @@ Unity Toon Shader のリリース履歴は、[こちら](../CHANGELOG.md)。
 UTS2 のリリース履歴は、[こちら](./UTS2_HISTORY_ja.md)。  
 
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-**README_ja.md 2021/06/04**
+**README_ja.md 2021/06/14**