Broken link to the conference page on translated webpage

[schiessle]

Yesterday a customer told me that our conference page is broken (404). After investigating, I found out that this only happens if you go to German or French translation of https://nextcloud.com/events/

In this case the URL is for example https://nextcloud.com/de/events/ and if you click now on the "learn more about the Nextcloud Conference" link you go to redirected to https://nextcloud.com/de/conf (404) instead of https://nextcloud.com/conf which gets redirected correctly to https://nextcloud.com/conf-2020/