update dotkernel logo

[arhimede]

one from here

https://github.com/dotkernel/dotkernel.github.io/tree/main/img

[arhimede]

https://github.com/dotkernel/dotkernel.github.io/blob/main/img/dk_logo_2024.svg

[arhimede]

@MarioRadu

[arhimede]

fixed in #261