Update README for problem 312

Author: anirudhology

README.md

@@ -111,6 +111,7 @@ LeetCode solutions in Go programming language.
 | 297        | Serialize And Deserialize Binary Tree                     | [Solution](problems/tree/serialize_and_deserialize_binary_tree.go)                         | Hard       | Binary Tree, BFS                      |
 | 300        | Longest Increasing Subsequence                            | [Solution](problems/dynamic_programming/longest_increasing_subsequence.go)                 | Medium     | Dynamic Programming                   |
 | 309        | Best Time To Buy And Sell Stocks With Cooldown            | [Solution](problems/dynamic_programming/best_time_to_buy_and_sell_stocks_with_cooldown.go) | Medium     | Dynamic Programming                   |
+| 312        | Burst Balloons                                            | [Solution](problems/dynamic_programming/burst_balloons.go)                                 | Hard       | Dynamic Programming                   |
 | 322        | Coin Change                                               | [Solution](problems/dynamic_programming/coin_change.go)                                    | Medium     | Dynamic Programming                   |
 | 323        | Number Of Connected Components In An Undirected Graph     | [Solution](problems/union_find/number_of_connected_components_in_an_undirected_graph.go)   | Medium     | Union Find, Graph                     |
 | 329        | Longest Increasing Path In A Matrix                       | [Solution](problems/dynamic_programming/longest_increasing_path_in_a_matrix.go)            | Hard       | Dynamic Programming, DFS              |