Repair "See Your Security Level" onboarding button
TBB 8.5 update from 8.0.9
Onboarding dialog, "Security" pane has a grey button, "See Your Security Level". Clicking it opens a 404 Not Found to https://tb-manual.torproject.org/security-settings.html
I guess it was supposed to be https://tb-manual.torproject.org/security-settings/