Update README.md

README.md

@@ -133,8 +133,8 @@ npm run build:dev:watch
 npm test
 ```
 
-Documents
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+Documentation
+--------------
 
 * [github wiki pages](https://github.com/weseek/crowi-plus/wiki)
   * [Question and Answers](https://github.com/weseek/crowi-plus/wiki/Question-and-Answers)