access: use archetypes key, not legacy

legacy was a Moodle 1.9 key

Author: jrchamp

db/access.php

@@ -62,7 +62,7 @@
     'mod/zoom:view' => [
         'captype' => 'read',
         'contextlevel' => CONTEXT_MODULE,
-        'legacy' => [
+        'archetypes' => [
             'guest' => CAP_ALLOW,
             'student' => CAP_ALLOW,
             'teacher' => CAP_ALLOW,