Git commits in Moodle 3.9.7 by Septatrix

commit 9d6fff9671adcd5742b40ec10038c01906e1ebda
Author: Septatrix <24257556+Septatrix@users.noreply.github.com>
Date:   Sat, 17 Apr 2021 18:49:15 +0800
Tag:    v3.9.7

MDL-70110 assign: add group submission attemptnumber test