"Added assignment of this.tail to newNode in SortedLinkedList class."

Author: mjk22071998

src/main/java/com/thealgorithms/datastructures/lists/SortedLinkedList.java

@@ -39,6 +39,7 @@ else if (value < head.value) {
         } 
         else if (value > tail.value) {
             this.tail.next = newNode;
+            this.tail = newNode;
         }
         else{
             Node temp = head;