docs: update README.md

Author: eltociear

README.md

@@ -1,6 +1,6 @@
 
 # 🕷️ ScrapeGraphAI: You Only Scrape Once
-[English](https://github.com/VinciGit00/Scrapegraph-ai/blob/main/README.md) | [中文](https://github.com/VinciGit00/Scrapegraph-ai/blob/main/docs/chinese.md)
+[English](https://github.com/VinciGit00/Scrapegraph-ai/blob/main/README.md) | [中文](https://github.com/VinciGit00/Scrapegraph-ai/blob/main/docs/chinese.md) | [日本語](https://github.com/VinciGit00/Scrapegraph-ai/blob/main/docs/japanese.md)
 
 [![Downloads](https://static.pepy.tech/badge/scrapegraphai)](https://pepy.tech/project/scrapegraphai)
 [![linting: pylint](https://img.shields.io/badge/linting-pylint-yellowgreen)](https://github.com/pylint-dev/pylint)