Fix alt text of Ukraine flag (#72)

Author: mheob

README.md

@@ -2943,7 +2943,7 @@ This is also available in other languages:
 - ![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**: [3xp1o1t/clean-code-typescript](https://github.com/3xp1o1t/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)
-- ![vi](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Ukraine.png) **Ukrainian**: [KirillPd/clean-code-typescript](https://github.com/KirillPd/clean-code-typescript)
+- ![uk](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Ukraine.png) **Ukrainian**: [KirillPd/clean-code-typescript](https://github.com/KirillPd/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.