fix: update leetcode solution: No.142

更新LeetCode题解：No.142:环形链表 II

Author: yanglbme

README.md

@@ -58,7 +58,7 @@
 
 非常感谢以下所有朋友对本项目的贡献，你们是最可爱的人！
 
-<a href="https://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=true" target="_blank"><img src="https://opencollective.com/doocs-leetcode/contributors.svg?width=1200&button=false" /></a>
+<a href="https://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=true" target="_blank"><img src="https://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=false" /></a>
 
 ## 赞助人
 

README_EN.md

@@ -56,7 +56,7 @@ 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://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=true"><img src="https://opencollective.com/doocs-leetcode/contributors.svg?width=1200&button=false" /></a>
+<a href="https://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=true" target="_blank"><img src="https://opencollective.com/doocs-leetcode/contributors.svg?width=890&button=false" /></a>
 
 ## Backers
 

solution/0100-0199/0142.Linked List Cycle II/README.md

@@ -19,7 +19,7 @@
 <strong>解释：</strong>链表中有一个环，其尾部连接到第二个节点。
 </pre>
 
-<p><img alt="" src="https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/12/07/circularlinkedlist.png" style="height: 97px; width: 300px;"></p>
+![](./images/circularlinkedlist.png)
 
 <p><strong>示例&nbsp;2：</strong></p>
 
@@ -28,7 +28,7 @@
 <strong>解释：</strong>链表中有一个环，其尾部连接到第一个节点。
 </pre>
 
-<p><img alt="" src="https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/12/07/circularlinkedlist_test2.png" style="height: 74px; width: 141px;"></p>
+![](./images/circularlinkedlist_test2.png)
 
 <p><strong>示例 3：</strong></p>
 
@@ -37,7 +37,7 @@
 <strong>解释：</strong>链表中没有环。
 </pre>
 
-<p><img alt="" src="https://assets.leetcode-cn.com/aliyun-lc-upload/uploads/2018/12/07/circularlinkedlist_test3.png" style="height: 45px; width: 45px;"></p>
+![](./images/circularlinkedlist_test3.png)
 
 <p>&nbsp;</p>