Update README.md

Author: vladdez

README.md

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 # ERPExplorer.jl
 Repository for interactive EEG/ERP/rERP visualization tool based on WGLMakie.jl
 
-[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://s-ccs.github.io/ERPExplorer.jl/dev)
+[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://s-ccs.github.io/ERPExplorer.jl/dev)
+
+<img src="https://github.com/user-attachments/assets/59dec7c8-ebb9-4bd1-af55-a50c95709411" alt="image" height="300">