fix: put icon back

Author: mcanouil

docs/authoring/includes.qmd

@@ -17,7 +17,7 @@ To include a file, add the `{{{< include >}}}` shortcode at the location in your
 Include shortcodes are equivalent to copying and pasting the text from the included file into the main file.
 This means that relative references (links, images, etc.) inside the included file resolve based on the directory of the main file not the included file.
 
-::: {.callout-tip icon="false"}
+::: {.callout-tip}
 Use absolute (to the project root) paths for links and images in included files to ensure they resolve correctly, *e.g.*, `{{< include /path/to/file.qmd >}}`.
 :::