fix low image quality in /docs/guidelines/ in Dark Mode

[Hemxnt]

Project

Name of the project low image quality in /docs/guidelines/ in Dark Mode

Changes

What was updated (new pages, weekly update, etc.) enhanced /static/img/logo.png

Notes

If there are any further notes.

[GMishx]

@Hemxnt , try using this image. The image I see in the commit is slightly stretched horizontally.

[GMishx]

Closing in favor of #233