Update Statamic logo in README

Author: duncanmcclean

README.md

@@ -1,4 +1,6 @@
-<!-- statamic:hide --><p align="center"><img src="https://statamic.com/assets/branding/Statamic-Logo-Rad.png" width="100" alt="Statamic Logo" /></p>
+<!-- statamic:hide -->
+<p align="center"><img src="https://statamic.com/assets/branding/squircle/statamic-mark-lime.svg" width="100" alt="Statamic Logo" /></p>
+
 <h1 align="center">
   Statamic Starter Kit: Doogie Browser
 </h1>