Update README.md

Fix URL for datafold.com

Author: glebmezh

README.md

@@ -1,5 +1,5 @@
 <p align="left">
-    <img alt="Datafold" src="https://user-images.githubusercontent.com/1799931/196497110-d3de1113-a97f-4322-b531-026d859b867a.png" width="30%" />
+    <a href="https://datafold.com/"><img alt="Datafold" src="https://user-images.githubusercontent.com/1799931/196497110-d3de1113-a97f-4322-b531-026d859b867a.png" width="30%" /></a>
 </p>
 
 <h1 align="left">