minor update 3

Author: fishercoder1534

paginated_contents/algorithms/2nd_thousand/README.md

@@ -468,5 +468,5 @@
 | 1008 | [Construct Binary Search Tree from Preorder Traversal](https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/)                                                  | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1008.java)                                                                                       |                                                    | Medium     | Recursion                                                            
 | 1005 | [Maximize Sum Of Array After K Negations](https://leetcode.com/problems/maximize-sum-of-array-after-k-negations/)                                                                            | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1005.java)                                                                                       | [:tv:](https://youtu.be/spiwTAuz1_4)               | Easy       |
 | 1004 | [Max Consecutive Ones III](https://leetcode.com/problems/max-consecutive-ones-iii/)                                                                                                          | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1004.java)                                                                                       | [:tv:](https://youtu.be/nKhteIRZ2Ok)               | Medium     | Two Pointers, Sliding Window                                         
-| 1003 | [Check If Word Is Valid After Substitutions](https://leetcode.com/problems/check-if-word-is-valid-after-substitutions/)                                                                      | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1003.java)                                                                                       |                                                    | Medium     |
+| 1003 | [Check If Word Is Valid After Substitutions](https://leetcode.com/problems/check-if-word-is-valid-after-substitutions/)                                                                      | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1003.java)                                                                                       |                                                    | Medium     | 
 | 1002 | [Find Common Characters](https://leetcode.com/problems/find-common-characters/)                                                                                                              | [Solution](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/secondthousand/_1002.java)                                                                                       |                                                    | Easy       |