add Kukis Global to our list of backers

[boulder225]

🎯 Problem to be solved:
We forgot to add Kukis Global (https://www.kukis-global.com/) to our list of backers on our website https://obol.tech/. This omission has resulted in the absence of acknowledgement for their support, potentially hurting their relationship with our platform.

🛠️ Proposed solution:
To rectify this oversight, we should immediately update the list of backers on the website https://obol.tech/ to include Kukis Global (https://www.kukis-global.com/).

[boulder225]

[f1lander]

@boulder225 do we have the file logo?

[f1lander]

Added here, #91