Git commits in Moodle 3.9.7 by Adam Olley

commit 3b6104d6dc228300ef1e794a8facf302656d1cca
Author: Adam Olley <adam.olley@openlms.net>
Date:   Fri, 16 Apr 2021 12:28:28 +0800
Tag:    v3.9.7

MDL-70622 mod_lti: Prevent xss on lti 1.3 authentication script