Fix: Problems found in automatic a11y testing

[virus-rpi]

This PR fixes all problems found by the automatic a11y tests and this PR has to be merged so the test pass on the other branch.
This PR is very small because the other issues that were found by automated tests were fixed in the other a11y PRs

Changes:

• Changed a li to a div because of the error "<li> elements must be contained in a <ul> or <ol> (listitem)"

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[hofmann-felix]

Awesome 🚀 Thanks for spotting and fixing this issue