Adding the hyperlink for DOM challenges/concepts

Author: ptbhatcoder

README.md

@@ -27,10 +27,10 @@
 <div align="center">
 	<h2>JavaScript Modern Interview Code Challenges by topic</h2>
 
-| Primitives  | Functions   | Objects     | Collections | Async |
-| ----------- | ----------- | ----------- | ----------- | --------------- |
-| [Concepts](./challenges/primitives-concepts.md#home)      | [Concepts](./challenges/functions-concepts.md#home)      | [Concepts](./challenges/objects-concepts.md#home)      | [Concepts](./challenges/collections-concepts.md#home)       | [Concepts](./challenges/async-concepts.md#home)     |
-| [Challenges](./challenges/primitives-challenges.md#home)  | [Challenges](./challenges/functions-challenges.md#home)  | [Challenges](./challenges/objects-challenges.md#home)  | [Challenges](./challenges/collections-challenges.md#home)   | [Challenges](./challenges/async-challenges.md#home) |
+| Primitives  | Functions   | Objects     | Collections | Async | DOM |
+| ----------- | ----------- | ----------- | ----------- | --------------- | -------------- |
+| [Concepts](./challenges/primitives-concepts.md#home)      | [Concepts](./challenges/functions-concepts.md#home)      | [Concepts](./challenges/objects-concepts.md#home)      | [Concepts](./challenges/collections-concepts.md#home)       | [Concepts](./challenges/async-concepts.md#home)     | [Concepts](./challenges/dom-challenges.md#home) |
+| [Challenges](./challenges/primitives-challenges.md#home)  | [Challenges](./challenges/functions-challenges.md#home)  | [Challenges](./challenges/objects-challenges.md#home)  | [Challenges](./challenges/collections-challenges.md#home)   | [Challenges](./challenges/async-challenges.md#home) | [Challenges](./challenges/dom-challenges.md#home) |
 
 </div>