Update README.md

Author: operando

README.md

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 [![Join the chat at https://gitter.im/AndroidFrameworkCodeReading/CodeReadingHistory](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/AndroidFrameworkCodeReading/CodeReadingHistory?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Android Code Reading History
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+* [まったりAndroid Framework Code Reading #1](https://github.com/AndroidFrameworkCodeReading/CodeReadingHistory/wiki/%E3%81%BE%E3%81%A3%E3%81%9F%E3%82%8AAndroid-Framework-Code-Reading-%231)