Change v5.3 to 5.3
When the badge already says 'version' it doesn't make sense to put the 'v' before the version number.
<h1 align="center"> LittlevGL - Open-source Embedded GUI Library</h1>
<p align="center">
<a href="https://github.com/littlevgl/lvgl/blob/master/LICENCE.txt"><img src="https://img.shields.io/badge/licence-MIT-blue.svg"></a>
-<a href="https://github.com/littlevgl/lvgl/releases/tag/v5.3"><img src="https://img.shields.io/badge/version-v5.3-blue.svg"></a>
+<a href="https://github.com/littlevgl/lvgl/releases/tag/v5.3"><img src="https://img.shields.io/badge/version-5.3-blue.svg"></a>
<br>
<img src="https://littlevgl.com/github/cover_ori_reduced_2.gif">
</p>
