Update 'web/oracle/index.md'

1 year ago · c0d013320c
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@ -15,7 +15,7 @@ author: Ada
 **Zhuàngzi**
 **莊子**

-# ✧ Preface
+## ✧ Preface

 Have you ever woken up feeling like there is a word on the tip of your tongue in a language you don't quite understand?