Update version.php

change 40 -> 400

Author: stefanscholz

version.php

@@ -29,6 +29,6 @@
 $plugin->requires  = 2020061500;
 $plugin->component = 'block_socialcomments';
 $plugin->maturity  = MATURITY_STABLE;
-$plugin->supported = [39, 40];
+$plugin->supported = [39, 400];
 $plugin->release = '1.2';