Update README.md

ClaireGyn · web-flow · commit 304100d8bafc · 2023-05-12T19:23:53.000+08:00
More info to come
diff --git a/README.md b/README.md
@@ -31,7 +31,7 @@ The followings are the key steps to try the calibration process:
 $ pip install -r requirements.txt
 ```
 
-### File structure
+## File structure
 ```
 To be added 
 ```
