Add image to create_your_own_course.md

Added an image to the 'Create Your Own EEG Course' section.

Author: arnodelorme

workshops/create_your_own_course.md

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 parent: Workshops
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+<img width="200" align="right"  alt="classroom" src="https://github.com/user-attachments/assets/61801614-5271-494d-a3b8-aaed15f10f57" />
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 # Create Your Own EEG Course
 
 This [repository](https://github.com/sccn/EEGLAB_course) contains materials for EEGLAB course sessions. This course was originally conducted at the [practical MEEG 2025 workshop](https://cuttingeeg.org/practicalmeeg2025/). Although this course is centered on EEGLAB, 90% of the material is not EEGLAB-specific.