Fix the descriptive workflow title

Author: vedran-kasalica

src/main/java/nl/uu/cs/ape/solver/solutionStructure/SolutionWorkflow.java

@@ -315,7 +315,7 @@ public String getDescriptiveName() {
         StringBuilder descrName = new StringBuilder();
         this.moduleNodes
                 .forEach(moduleNode -> descrName.append(moduleNode.getUsedModule().getPredicateLabel()).append("->"));
-        descrName.delete(descrName.length() - 1, descrName.length());
+        descrName.delete(descrName.length() - 2, descrName.length());
         return descrName.toString();
     }