Fixed typo in comment.

src/solvers/GreedyConstruction.java

@@ -27,8 +27,7 @@ record Merger(int first, int second, double change) { }
 public final class GreedyConstruction {
   private final List<Collection<Integer>> clusters;  // list of clusters
   private final Problem problem;                     // problem to solve
-  private final int maxSize;                         // maximum problem size
-
+  private final int maxSize;                         // maximum cluster size
 
   /**
    * Constructs the heuristic instance and solves it.