comment fix

Author: caspernorrbin

src/hotspot/share/utilities/rbTree.hpp

@@ -385,7 +385,7 @@ class RBTree : public AbstractRBTree<K, RBNode<K, V>, COMPARATOR> {
 
   void free_node(RBNode<K, V>* node);
 
-  // Updates the key in the given the node or node cursor.
+  // Updates the key in the given node or node cursor.
   // The user must ensure that no tree properties are broken:
   // There must not exist any node with the new key
   // For all nodes with key < old_key, must also have key < new_key