Describe the update or improvement you would like to see
Instructions, how to configure dark theme logo in README.md

https://github.blog/developer-skills/github/how-to-make-your-images-in-markdown-on-github-adjust-for-dark-mode-and-light-mode/

Is this related to a specific part of the documentation?
README.md

Why is this update needed?
Better logo visibility.

Additional context
Stride logo branding improvement.

Proposed changes
Follow the instrutions in the link above.