Update importing-assets.md

docs/en/manuals/importing-assets.md

@@ -14,7 +14,7 @@ Defold needs all the assets used in your project to be located somewhere in the
 
 ![Importing files](images/graphics/import.png){srcset="images/graphics/[email protected] 2x"}
 
-:::sidenote
+::: sidenote
 Defold supports images in the PNG and JPEG image formats. Other image formats need to be converted before they can be used.
 :::