Added ref to Japanese translation

Author: dimadeveatii

README.md

@@ -3262,6 +3262,7 @@ This is also available in other languages:
 - ![cn](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/China.png) **Chinese**: 
   - [beginor/clean-code-typescript](https://github.com/beginor/clean-code-typescript)
   - [pipiliang/clean-code-typescript](https://github.com/pipiliang/clean-code-typescript)
+- ![ja](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Japan.png) **Japanese**: [MSakamaki/clean-code-typescript](https://github.com/MSakamaki/clean-code-typescript)
 
 本文也有其它语言版本：
 
@@ -3272,7 +3273,6 @@ This is also available in other languages:
 
 There is work in progress for translating this to other languages:
 
-- ![ja](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Japan.png) Japanese
 - ![kr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/South-Korea.png) Korean
 
 还有一些语言的版本也正在翻译中：