fix error in README

README.md

@@ -9,7 +9,7 @@ The Source code for paper:
 
 The benchmark is selected for [MaxSAT Evaluation 2021](https://maxsat-evaluations.github.io/2021/).
 
-## Prerequisiteshttps://gepgitlab.laas.fr/hhu/maxsat-decision-trees
+## Prerequisites
 Some necessary python packages needed to execute the code:
 
 -**python-sat**: check in (https://github.com/pysathq/pysat). It contains the API for different SAT solver and RC2 as MaxSAT solver.