Onion instances of searxng should link to the onion version of the wayback machine's "cached" webpage by default.

[barkoder]

Is your feature request related to a problem? Please describe.

Currently when using an onion instance of searxng, the "cached" webpage on the wayback machine links to the clearweb version of the wayback machine - https://web.archive.org/web/ .
But the wayback machine has an onion instance now - https://web.archive6zg5vrdwm4ljllgxleekeoj43lqayscd4d4kmhnyblq4h3ead.onion .

Describe the solution you'd like
The "cached" link on an onion versions searxng instances should link to https://web.archive6zg5vrdwm4ljllgxleekeoj43lqayscd4d4kmhnyblq4h3ead.onion/web/ by default instead of the clearweb version as it is currently.

Describe alternatives you've considered
I know that setting privacy.prioritizeonions.showNotification to True in Tor Browser would work. I know I could also set up a redirect in Redirector, but there's no way to do any of that in lynx, links, w3m and other text based browsers.

Additional context
Please make it the default.
Thank you so much for searxng. It's amazing!