Add else clause for node (#3014)

Co-authored-by: Samir M'Sallem <samir.msallem@valtech-mobility.com>
Co-authored-by: Andrii Siriak <siryaka@gmail.com>

src/main/java/com/thealgorithms/datastructures/hashmap/hashing/HashMap.java

@@ -105,6 +105,8 @@ public class HashMap {
                 } else {
                     n.setNext(n.getNext().getNext());
                 }
+            } else {
+                delete(n.getNext(), key);
             }
         }