OPENSUSE-SU-2020:1652-1 Security update for nextcloud

This update for nextcloud fixes the following issues: nextcloud version 20.0.0 fix some security issues: - NC-SA-2020-037 PIN for passwordless WebAuthm is asked for but not verified - NC-SA-2020-033 CVE-2020-8228 Missing rate limit on signup page - NC-SA-2020-029 CVE-2020-8233, boo1177346...