Add cross link ReadMe EN - VI

README.md

@@ -14,7 +14,7 @@
 [![French](https://img.shields.io/badge/-French-purple)](translations/README.fr.md)
 [![Korean](https://img.shields.io/badge/-Korean-white)](translations/README.ko.md)
 [![Japanese](https://img.shields.io/badge/-Japanese-red)](translations/README.ja.md)
-
+[![Vietnamese](https://img.shields.io/badge/-Vietnam-pink)](translations/README.vi.md)
 # IoT for Beginners - A Curriculum
 
 Azure Cloud Advocates at Microsoft are pleased to offer a 12-week, 24-lesson curriculum all about IoT basics. Each lesson includes pre- and post-lesson quizzes, written instructions to complete the lesson, a solution, an assignment and more. Our project-based pedagogy allows you to learn while building, a proven way for new skills to 'stick'.

translations/README.vi.md

@@ -14,7 +14,7 @@
 [![French](https://img.shields.io/badge/-French-purple)](translations/README.fr.md)
 [![Korean](https://img.shields.io/badge/-Korean-white)](translations/README.ko.md)
 [![Japanese](https://img.shields.io/badge/-Japanese-red)](translations/README.ja.md)
-[![Vietnamese](https://img.shields.io/badge/-Vietnam-red)](translations/README.vi.md)
+[![English](https://img.shields.io/badge/-English-white)](../README.md)
 
 
 # IoT cho người mới bắt đầu - Giáo trình