Update formatting.

* crates.io's markdown to html seems to need the closing div

Author: hydra

README.md

@@ -7,6 +7,8 @@
 [![Donate via Ko-Fi](https://img.shields.io/badge/Ko--Fi-Donate-green?style=flat&color=%2332c955&logo=ko-fi)](https://ko-fi.com/dominicclifton)
 [![Subscribe on Patreon](https://img.shields.io/badge/Patreon-Subscribe-green?style=flat&color=%2332c955&logo=patreon)](https://www.patreon.com/MakerPnP)
 
+</div>
+
 # egui_vertical_stack
 
 A vertical stack of panels.