chore: update contributors

* Use contrib.rocks
* For more details, visit https://contrib.rocks/image?repo=doocs/leetcode

Author: yanglbme

README.md

@@ -164,7 +164,7 @@
 
 感谢以下所有朋友对本项目的贡献！
 
-<a href="https://github.com/doocs/leetcode/graphs/contributors" target="_blank"><img src="./images/contributors.svg" /></a>
+<a href="https://github.com/doocs/leetcode/graphs/contributors" target="_blank"><img src="https://contrib.rocks/image?repo=doocs/leetcode" /></a>
 
 ## 赞助者
 

README_EN.md

@@ -157,7 +157,7 @@ You can also contribute to [doocs/leetcode](https://github.com/doocs/leetcode) u
 
 This project exists thanks to all the people who contribute.
 
-<a href="https://github.com/doocs/leetcode/graphs/contributors" target="_blank"><img src="./images/contributors.svg" /></a>
+<a href="https://github.com/doocs/leetcode/graphs/contributors" target="_blank"><img src="https://contrib.rocks/image?repo=doocs/leetcode" /></a>
 
 ## Backers & Sponsors