fix: update xflow docs img

sites/x6-sites/docs/xflow/guide/introduction.md

@@ -32,7 +32,7 @@ XFlow 是基于 X6 图编辑引擎、面向 React 技术栈用户的应用级解
 - 语雀专栏：<https://www.yuque.com/antv/blog>
 
 <a href="https://qr.dingtalk.com/action/joingroup?code=v1,k1,rOHuvgq5s0EHDktyyQJffDE3ZAmHnbB2e6iwn/w4BKs=&#x26;_dt_no_comment=1&#x26;origin=11" target="_blank" rel="noopener noreferrer">
-  <img src="https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/f2b9da3884af4975b700cee222e180af~tplv-k3u1fbpfcp-jj-mark:0:0:0:0:q75.image#?w=772&#x26;h=1020&#x26;s=277761&#x26;e=png&#x26;b=fcfcfc" alt="XFlow 图可视化交流群" width="375">
+  <img src="https://gw.alipayobjects.com/mdn/rms_19b204/afts/img/A*KuL6R7t0Xw0AAAAAAAAAAAAAARQnAQ" alt="XFlow 图可视化交流群" width="375">
 </a>
 
 ## 如何参与贡献
@@ -44,5 +44,5 @@ XFlow 是基于 X6 图编辑引擎、面向 React 技术栈用户的应用级解
 如需提交代码，请遵从我们的[贡献指南](https://github.com/antvis/X6/blob/master/CONTRIBUTING.zh-CN.md)。
 
 <a href="https://github.com/antvis/xflow/graphs/contributors" target="_blank" rel="noopener noreferrer">
-  <img src="https://p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/23f0aa70099845aa97ed270dd5415f00~tplv-k3u1fbpfcp-image.image#?w=890&#x26;h=212&#x26;s=709340&#x26;e=svg&#x26;a=1&#x26;b=e4dcda">
+  <img src="https://opencollective.com/x6/contributors.svg?width=890&button=false">
 </a>