Add screenshots to "How to Run a GenderMag Session Using the Tool" section of readme

[studentaly]

• Feature description: (Example: Add an exit button)
  In the readme, add some screenshots for the "How to Run a GenderMag Session Using the Tool" section to help visual learners understand how to use the tool.

• Reason for the feature or improvement: (Example: there is no right way to exit from the application)
  The text and accompanying video do a great job at describing how to use the tool, but for primarily visual learners, we are used to having some screenshots sprinkled in with text. This change could help the readme be more inclusive to users who are visual learners.

• How does your idea fit with the aim/scope of the project? (Example: feature gives the workflow)
  As the GenderMag Project is sensitive to inclusivity and the needs of different user personas, this could help the guide be more inclusive to those who struggle to read through text and benefit from visual learning aids.

• What are the merits of the feature? (Example: prevent data loss)
  This could help onboard visual learners more quickly and seamlessly.

• Screenshots, if you can show something similar, or a sketch:
  This is just an example of a user guide with pictures from Slack that incorporates screenshots, so the user can visually connect what they are looking for.
  

• Any other information: