Current contents of the string userfeedbackencouragement @ admin/index.php are:
Moodle 3.9 includes a new feature that gives users the option to provide feedback about the Moodle software to Moodle HQ via an external survey site hosted by Moodle HQ. No user-identifying information is forwarded to the survey site.
While that's ok for Moodle 3.9... it's not for 3.10dev or 4.0dev. So we should consider amending that string, 2 alternatives I can imagine are:
1) Or we make it version agnostic, not mentioning any.
2) Or we make the version a param and pass the correct one for each version (removing "dev" and just presenting the "major" numbers, maybe from $branch.