Update screenshot on README.

Author: knadh

README.md

@@ -2,9 +2,9 @@
 
 [![listmonk-logo](https://user-images.githubusercontent.com/547147/231084896-835dba66-2dfe-497c-ba0f-787564c0819e.png)](https://listmonk.app)
 
-listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL (⩾ 12) database as its data store.
+listmonk is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL database as its data store.
 
-[![listmonk-dashboard](https://user-images.githubusercontent.com/547147/134939475-e0391111-f762-44cb-b056-6cb0857755e3.png)](https://listmonk.app)
+[![listmonk-dashboard](https://github.com/user-attachments/assets/689b5fbb-dd25-4956-a36f-e3226a65f9c4)](https://listmonk.app)
 
 Visit [listmonk.app](https://listmonk.app) for more info. Check out the [**live demo**](https://demo.listmonk.app).