docs: update publish.mdx (#1543)

Co-authored-by: Michał Olender <[email protected]>

Author: mhamas

sources/platform/actors/publishing/publish.mdx

@@ -31,6 +31,10 @@ To verity that your Actor has been published successfully, go to the [Apify Stor
 
 ![Actor page](./images/actor-page.webp)
 
+### Logo
+
+We strongly recommend adding a unique image to your Actor that visually represents the service it provides. This helps users quickly understand its purpose. However, do not use official logos or branded images from the sites you're scraping, as this can lead to copyright or trademark issues.
+
 ### Description
 
 The Actor's description is a short paragraph that explains its purpose. It will be displayed on the Actor's page, right below its title.