updated link for Common Child hackerrank problem

updated link for Common Child hackerrank problem

Author: kanahaiya

README.md

@@ -374,7 +374,7 @@ then you are at the right place. :)
 |:-----------------------------------:|:----------------------------------------------------------------------------------------------------------------------------:|:--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|:----------------------------------------------------------:|
 |      Dictionaries and Hashmaps      | [Count Triplets](https://www.hackerrank.com/challenges/count-triplets-1)                                					 | [CountTriplets.java](https://github.com/Java-aid/Hackerrank-Solutions/blob/master/HackerRankDashboard/Interview-Preparation-Kit/src/main/java/com/javaaid/dictionaries/CountTriplets.java)                         	  										   	    | 		[Tutorial](https://youtu.be/tBFZMaWP0W8)		     |
 |      			Search			      | [Triple sum](https://www.hackerrank.com/challenges/triple-sum/problem)                                					     | [TripleSum.java](https://github.com/Java-aid/Hackerrank-Solutions/blob/master/HackerRankDashboard/Interview-Preparation-Kit/src/main/java/com/javaaid/search/TripleSum.java)                         	  										   	  			    | 		[Tutorial](https://youtu.be/pVkHLciuank)		     |
-|      	String Manipulation			  | [Common Child](https://www.hackerrank.com/challenges/triple-sum/problem)                                					 | [CommonChild.java](https://github.com/Java-aid/Hackerrank-Solutions/blob/master/HackerRankDashboard/CoreCS/Algorithms/src/main/java/com/javaaid/hackerrank/solutions/algorithms/strings/CommonChild.java)                         	  								| 		[Tutorial](https://youtu.be/ItRZRx8kvwY)		     |
+|      	String Manipulation			  | [Common Child](https://www.hackerrank.com/challenges/common-child/problem)                                					 | [CommonChild.java](https://github.com/Java-aid/Hackerrank-Solutions/blob/master/HackerRankDashboard/CoreCS/Algorithms/src/main/java/com/javaaid/hackerrank/solutions/algorithms/strings/CommonChild.java)                         	  								| 		[Tutorial](https://youtu.be/ItRZRx8kvwY)		     |