fix-cla-sign-in-404-error (#2413)

* fix-cla-sign-in-404-error

* Update how-to-contribute.md

* Update docs-2.0-en/15.contribution/how-to-contribute.md

Co-authored-by: Chris Chen <chris.chen@vesoft.com>

---------

Co-authored-by: Chris Chen <chris.chen@vesoft.com>

docs-2.0-en/15.contribution/how-to-contribute.md

@@ -6,25 +6,23 @@
 
 You are welcome to contribute any code or files to the project. But firstly we suggest you raise an issue on the [github](https://github.com/vesoft-inc/nebula) or the [forum](https://github.com/vesoft-inc/nebula/discussions) to start a discussion with the community. Check through the topic for Github.
 
-### Sign the Contributor License Agreement (CLA)
+### Sign the Contributor License Agreement [CLA](https://www.apache.org/licenses/contributor-agreements.html)
 
-What is [CLA](https://www.apache.org/licenses/contributor-agreements.html)?
+1. Open the [CLA sign-in](https://cla-assistant.io/) page.
+2. Click the **Sign in with GitHub** button to sign in.
+3. Read and agree to the [vesoft inc. Contributor License Agreement](https://cla-assistant.io/vesoft-inc/).
 
-Here is the [vesoft inc. Contributor License Agreement](https://cla-assistant.io/vesoft-inc/).
-
-Click the **Sign in with GitHub to agree** button to sign the CLA.
-
-If you have any questions, send an email to `info@vesoft.com`.
+If you have any questions, submit an [issue](https://github.com/vesoft-inc/nebula/issues).
 
 ## Modify a single document
 
 This manual is written in the Markdown language. Click the `pencil` icon on the right of the document title to commit the modification.
 
-This method applies to modify a single document only.
+This method applies to modifying a single document only.
 
 ## Batch modify or add files
 
-This method applies to contribute codes, modify multiple documents in batches, or add new documents.
+This method applies to contributing code, modifying multiple documents in batches, or adding new documents.
 
 ## Step 1: Fork in the github.com
 

docs-2.0-zh/15.contribution/how-to-contribute.md

@@ -6,15 +6,13 @@
 
 欢迎为项目贡献任何代码或文档，但是建议先在 [GitHub](https://github.com/vesoft-inc/nebula) 或[社区](https://discuss.nebula-graph.io/)上提交一个问题，和大家共同讨论。
 
-### 签署贡献者许可协议（CLA）
+### 签署贡献者许可协议 [CLA](https://www.apache.org/licenses/contributor-agreements.html)
 
-什么是 [CLA](https://www.apache.org/licenses/contributor-agreements.html)？
+1. 打开 [CLA 服务登录](https://cla-assistant.io/)页面。
+2. 单击 **Sign in with GitHub**。
+3. 阅读并同意协议 [vesoft inc. Contributor License Agreement](https://cla-assistant.io/vesoft-inc/)。
 
-签署协议链接：[vesoft inc. Contributor License Agreement](https://cla-assistant.io/vesoft-inc/)
-
-单击按钮 **Sign in with GitHub to agree** 签署协议。
-
-如果有任何问题，请发送邮件至`info@vesoft.com`。
+如果有任何问题，请提交 [issue](https://github.com/vesoft-inc/nebula/issues)。
 
 ## 修改单篇文档