Fixed website publish failed (apache#6802)

### Motivation

![image](https://user-images.githubusercontent.com/1907867/80059923-cf07be80-855f-11ea-8239-f0eaaec10634.png)


* Fixed website publish failed

### Modifications

* Fixed website publish failed

site2/tools/build-site.sh

@@ -35,15 +35,22 @@ yarn run crowdin-download
 cp versioned_docs/version-2.4.2/functions-develop.md translated_docs/zh-CN/version-2.4.2/functions-develop.md
 cp versioned_docs/version-2.5.0/functions-develop.md translated_docs/zh-CN/version-2.5.0/functions-develop.md
 cp versioned_docs/version-2.5.0/io-overview.md translated_docs/zh-CN/version-2.5.0/io-overview.md
+cp versioned_docs/version-2.5.1/functions-develop.md translated_docs/zh-CN/version-2.5.1/functions-develop.md
+
 cp versioned_docs/version-2.4.2/functions-develop.md translated_docs/ja/version-2.4.2/functions-develop.md
 cp versioned_docs/version-2.5.0/functions-develop.md translated_docs/ja/version-2.5.0/functions-develop.md
 cp versioned_docs/version-2.5.0/io-overview.md translated_docs/ja/version-2.5.0/io-overview.md
+cp versioned_docs/version-2.5.1/functions-develop.md translated_docs/ja/version-2.5.1/functions-develop.md
+
 cp versioned_docs/version-2.4.2/functions-develop.md translated_docs/fr/version-2.4.2/functions-develop.md
 cp versioned_docs/version-2.5.0/functions-develop.md translated_docs/fr/version-2.5.0/functions-develop.md
 cp versioned_docs/version-2.5.0/io-overview.md translated_docs/fr/version-2.5.0/io-overview.md
+cp versioned_docs/version-2.5.1/functions-develop.md translated_docs/fr/version-2.5.1/functions-develop.md
+
 cp versioned_docs/version-2.4.2/functions-develop.md translated_docs/zh-TW/version-2.4.2/functions-develop.md
 cp versioned_docs/version-2.5.0/functions-develop.md translated_docs/zh-TW/version-2.5.0/functions-develop.md
 cp versioned_docs/version-2.5.0/io-overview.md translated_docs/zh-TW/version-2.5.0/io-overview.md
+cp versioned_docs/version-2.5.1/functions-develop.md translated_docs/zh-TW/version-2.5.1/functions-develop.md
 
 yarn build