docs: use absolute URL for svg file

Signed-off-by: frank-zsy <[email protected]>

Author: frank-zsy

docs/user_docs/metrics/global_openrank.md

@@ -9,7 +9,7 @@
 全域 OpenRank 影响力是[`活跃度`](./activity)指标的一个下游指标，借鉴了`活跃度`来构建 GitHub 全域项目与开发者之间的一个协作网络，其网络模型是：
 
 <div style={{'text-align':'center'}}>
-  <embed src="/img/global_openrank.svg?bg_color=lightblue&lang=zh" width="80%" />
+  <embed src="https://open-digger.cn/img/global_openrank.svg?bg_color=lightblue&lang=zh" width="80%" />
 </div>
 
 ## 价值主张

i18n/en/docusaurus-plugin-content-docs/current/user_docs/metrics/global_openrank.md

@@ -9,7 +9,7 @@ Global OpenRank Influence is an open-source metric proposed by Dr. Frank Zhao fr
 Global OpenRank Influence is a downstream metric of the [`activity`](./activity) metric, which is used to build a collaboration network between global open source repositories and developers. Its network model is:
 
 <div style={{'text-align':'center'}}>
-  <embed src="/en/img/global_openrank.svg?bg_color=lightblue&lang=en" width="80%" />
+  <embed src="https://open-digger.cn/en/img/global_openrank.svg?bg_color=lightblue&lang=en" width="80%" />
 </div>
 
 ## Value Proposition