update readme file

Author: Md. Abdullah

README.md

@@ -1,6 +1,6 @@
 # Vuejs & TailwindCSS Portfolio - With Dark Mode
 
-A simple portfolio starter theme built with Vue.js v3 and TailwindCSS v2.
+A simple portfolio starter theme built with Vue.js v3 and TailwindCSS v3.
 
 ![Vuejs-TailwindCSS-Portfolio](https://user-images.githubusercontent.com/16396664/140909796-815239e4-a986-46ad-bbd0-4b166127bbb8.JPG)