Update README.md

Author: dmitriyakkerman

README.md

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 [![test](https://github.com/dmitriyakkerman/vue-youtube-widget/actions/workflows/test.yml/badge.svg)](https://github.com/dmitriyakkerman/vue-youtube-widget/actions/workflows/test.yml)
 # vue-youtube-widget
 
-> Vue.js youtube widget for your website using YouTube Api 3.
+> Vue.js YouTube widget for your website using YouTube Api 3.
 
 ![vue-youtube-widget](https://github.com/dmitriyakkerman/vue-youtube-widget/blob/master/images/vue-youtube-widget.png?raw=true)