Update README - Topic Tags

Author: shinecoding

README.md

@@ -33,6 +33,7 @@ Collection of LeetCode questions to ace the coding interview! - Created using [L
 | [0033-search-in-rotated-sorted-array](https://github.com/shinecoding/leetcode/tree/master/0033-search-in-rotated-sorted-array) |
 | [0046-permutations](https://github.com/shinecoding/leetcode/tree/master/0046-permutations) |
 | [0048-rotate-image](https://github.com/shinecoding/leetcode/tree/master/0048-rotate-image) |
+| [0078-subsets](https://github.com/shinecoding/leetcode/tree/master/0078-subsets) |
 | [0079-word-search](https://github.com/shinecoding/leetcode/tree/master/0079-word-search) |
 | [0139-word-break](https://github.com/shinecoding/leetcode/tree/master/0139-word-break) |
 | [0152-maximum-product-subarray](https://github.com/shinecoding/leetcode/tree/master/0152-maximum-product-subarray) |
@@ -45,6 +46,7 @@ Collection of LeetCode questions to ace the coding interview! - Created using [L
 | [0017-letter-combinations-of-a-phone-number](https://github.com/shinecoding/leetcode/tree/master/0017-letter-combinations-of-a-phone-number) |
 | [0022-generate-parentheses](https://github.com/shinecoding/leetcode/tree/master/0022-generate-parentheses) |
 | [0046-permutations](https://github.com/shinecoding/leetcode/tree/master/0046-permutations) |
+| [0078-subsets](https://github.com/shinecoding/leetcode/tree/master/0078-subsets) |
 | [0079-word-search](https://github.com/shinecoding/leetcode/tree/master/0079-word-search) |
 ## Hash Table
 |  |
@@ -116,4 +118,8 @@ Collection of LeetCode questions to ace the coding interview! - Created using [L
 |  |
 | ------- |
 | [0139-word-break](https://github.com/shinecoding/leetcode/tree/master/0139-word-break) |
+## Bit Manipulation
+|  |
+| ------- |
+| [0078-subsets](https://github.com/shinecoding/leetcode/tree/master/0078-subsets) |
 <!---LeetCode Topics End-->