[Docs] Add dark theme logo in README.md

[VaclavElias]

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.

[MikhailArsentevTheSecond]

It's already done in master
@VaclavElias

[VaclavElias]

Probably not done correctly, maybe the the images need to be local? The logos should be white in the dark theme

[MikhailArsentevTheSecond]

Sorry, i didn't check.

The problem is with an tag. It's his "src" is showing up. Not picture tag.

I'll try to fix it.

Or we can just use white only. No one use white theme anyway :)

[VaclavElias]

I use white theme 🙈💪