Fix postgrator numbering

Author: Wardormeur

scripts/database/pg/migrations/018.do.add-useDojoAddress-field-to-cd-events.sql renamed to scripts/database/pg/migrations/021.do.add-useDojoAddress-field-to-cd-events.sql

@@ -3,7 +3,7 @@ DO $$
     BEGIN
         ALTER TABLE cd_events ADD COLUMN use_dojo_address boolean;
     EXCEPTION
-        WHEN duplicate_column THEN RAISE NOTICE 'column useDojoAddress already exists in cd_applications.';
+        WHEN duplicate_column THEN RAISE NOTICE 'column useDojoAddress already exists in cd_events.';
     END;
   END;
 $$