docs: added Vietnamese translation

Author: dimadeveatii

README.md

@@ -2896,10 +2896,11 @@ This is also available in other languages:
   - [pipiliang/clean-code-typescript](https://github.com/pipiliang/clean-code-typescript)
 - ![fr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/France.png) **French**: [ralflorent/clean-code-typescript](https://github.com/ralflorent/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)
+- ![ko](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/South-Korea.png) **Korean**: [738/clean-code-typescript](https://github.com/738/clean-code-typescript)
 - ![ru](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Russia.png) **Russian**: [Real001/clean-code-typescript](https://github.com/Real001/clean-code-typescript)
 - ![es](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Spain.png) **Spanish**: [JoseDeFreitas/clean-code-typescript](https://github.com/JoseDeFreitas/clean-code-typescript)
 - ![tr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Turkey.png) **Turkish**: [ozanhonamlioglu/clean-code-typescript](https://github.com/ozanhonamlioglu/clean-code-typescript)
-- ![ko](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/South-Korea.png) **Korean**: [738/clean-code-typescript](https://github.com/738/clean-code-typescript)
+- ![vi](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Vietnam.png) **Vietnamese**: [hoangsetup/clean-code-typescript](https://github.com/hoangsetup/clean-code-typescript)
 
 References will be added once translations are completed.  
 Check this [discussion](https://github.com/labs42io/clean-code-typescript/issues/15) for more details and progress.