docs: v.kernel.html minor edits

[dhdeangelis]

No description provided.

[echoix]

Did you check that pre-commit doesn't complain about the line lengths? I can check later, but otherwise it's fine, even if it includes the other PR. It won't cause conflits though

[dhdeangelis]

Thank you, @echoix my mistake here, I tried to do two PRs but I believe I missed to branch from main. It is in any case the same.

No, I did not check for line length complaints, butr it seems it doesn't complain.

[echoix]

Checked locally, everything is alright