doc(README): move missing description

Author: LouisMazel

README.md

@@ -319,6 +319,8 @@ multiline code
 
 (15) `acceptedFiles` can be used to set specifics file types allowed in chat. By default, all file types are allowed: `"*"`.
 
+Example: set `accepted-files="image/png, image/peg, application/pdf"` to allow `JPG` `PNG` and `PDF` files
+
 (16) `styles` can be used to customize your own theme. Ex:
 
 ```javascript
@@ -446,9 +448,6 @@ styles="{
 }"
 ```
 
-
-Example: set `accepted-files="image/png, image/peg, application/pdf"` to allow `JPG` `PNG` and `PDF` files
-
 ## Props data structure
 
 Your props must follow a specific structure to display rooms and messages correctly: