docs: add screenshot

README.md

@@ -7,6 +7,9 @@
 Browser extension that allows you to easily select an element on any webpage and get suggestions for GTM triggers
 targeting the selected element.
 
+![Без імені](https://github.com/cawa-93/gtm-helper/assets/1662812/02e7feae-03d9-4da9-b7f9-e50a2453a248)
+
+
 **❤️ If you like this extension I will be appreciated for your support**:
 
 - [Buy me a coffee](https://www.buymeacoffee.com/kozack)