Update README.md

Author: kamyu104

README.md

@@ -189,7 +189,7 @@ I'll keep updating for full summary and better solutions. Stay tuned for updates
 720| [Longest Word in Dictionary](https://leetcode.com/problems/longest-word-in-dictionary/) | [C++](./C++/longest-word-in-dictionary.cpp)  [Python](./Python/longest-word-in-dictionary.py) | _O(n)_ | _O(t)_ | Easy         || Trie |
 722| [Remove Comments](https://leetcode.com/problems/remove-comments/) | [C++](./C++/remove-comments.cpp)  [Python](./Python/remove-comments.py) | _O(n)_ | _O(k)_ | Medium         |||
 751| [IP to CIDR](https://leetcode.com/problems/ip-to-cidr/) | [C++](./C++/ip-to-cidr.cpp)  [Python](./Python/ip-to-cidr.py) | _O(n)_ | _O(1)_ | Medium         |||
-758| [Bold Words in String](https://leetcode.com/problems/bold-words-in-string/) | [C++](./C++/bold-words-in-string.cpp) [Python](./Python/bold-words-in-string.py) | _O(n * l)_ | _O(t)_ |  Easy | variant of [Add Bold Tag in String](https://leetcode.com/problems/add-bold-tag-in-string/) |
+758| [Bold Words in String](https://leetcode.com/problems/bold-words-in-string/) | [C++](./C++/bold-words-in-string.cpp) [Python](./Python/bold-words-in-string.py) | _O(n * l)_ | _O(t)_ |  Easy | 📖, variant of [Add Bold Tag in String](https://leetcode.com/problems/add-bold-tag-in-string/) |
 
 ## Linked List
 |  #  | Title           |  Solution       |  Time           | Space           | Difficulty    | Tag          | Note|