Remove or workaround website test that fails with headlessui/react 2.1.5 (and maintainers say it works as intended)

[corneliusroemer]

I think we'll have to either workaround this test failure or remove the test because headlessui/react maintainers say this works as intended (IIUC):

• 2.1.5 breaks tests due to node.getAnimations tailwindlabs/headlessui#3468
• Upgrade from 2.1.4 to 2.1.5: TypeError: e.getAnimations is not a function tailwindlabs/headlessui#3469

We'll be on stuck with headlessui/react 2.1.4 until we've worked around this (unless there is a fix upstream, which I wouldn't rely on)