colab demo renaming

Author: JudithBernett

README.md

@@ -43,7 +43,8 @@ Use DrEval to Build Drug Response Models That Have an Impact
 This project is a collaboration of the Technical University of Munich (TUM, Germany)
 and the Freie Universität Berlin (FU, Germany).
 
-[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/daisybio/drevalpy/blob/development/dreval_demo.ipynb)
+Check out our demo notebook in Colab:
+[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/daisybio/drevalpy/blob/development/dreval_colab_demo.ipynb)
 
 ## Installation