add a line break prior to OpenOnDemand apps section

Author: DininduSenanayake

profile/README.md

@@ -83,7 +83,9 @@
 
 * The Oxford Centre for Microbiome Studies [github](https://github.com/OxfordCMS)
 
+- - - 
+<br>
 
 ## <img src="../profile_images/openondemand.png" alt="open-ondemand-logo" width="150"/> apps
 
-1. [Marimo](https://github.com/FredHutch/ood_marimo)
+1. [Marimo](https://github.com/FredHutch/ood_marimo)