add OSU to README

Author: Wim3000

README.md

@@ -2,7 +2,9 @@ This repo contains basic examples of Ximera constructs that can be used as
 * demo
 * tests
 
-The main branch is published [here](https://set-p-dsb-zomercursus-latest.cloud-ext.icts.kuleuven.be/ximeraexamples/coreXimeraFeatures/environments/theoremEnvironments).
+The main branch is published 
+ * at [KU Leuven](https://set-p-dsb-zomercursus-latest.cloud-ext.icts.kuleuven.be/ximeraexamples/coreXimeraFeatures/environments/theoremEnvironments).
+ * at [OSU](https://ximera.osu.edu/ximeraexamples).
 
 Note you can always get the TeX-code by appending .tex to the URL of an activity.