ci: fixup ci versions

Author: matthewhilton

version.php

@@ -30,4 +30,4 @@
 $plugin->requires  = 2022041900;
 $plugin->component = 'mod_observation';
 $plugin->maturity = MATURITY_STABLE;
-$plugin->supported = [40, 41];
+$plugin->supported = [400, 401];