Git commits in Moodle 3.9.7 by Helen Foster

commit 9031cf789da799e631691c21c6d06416a522a864
Author: Helen Foster <helen@moodle.org>
Date:   Tue, 04 May 2021 22:59:04 +0800
Tag:    v3.9.7

MDL-71425 lang: Import fixed English strings (en_fix)