Update README.md

Author: andre15silva

README.md

@@ -2,6 +2,8 @@
 
 GitBugs-Java is a reproducible Java benchmark of recent bugs.
 
+[Visualization](https://www.nuno.saavedra.pt/gitbugs-java)
+
 ## Setup GitBugs-Java
 
 Requirements:
@@ -49,4 +51,4 @@ gitbugs-java run WORK_DIR
 
 ## Contents of GitBugs-Java
 
-Please refer to the paper
+Please refer to the paper