chore(*.psql/*.sql): update all *.psql to *.sql files

queries/triggers/update_scheduled_status.psql

@@ -1,10 +0,0 @@
-CREATE OR REPLACE FUNCTION update_scheduled_episode_status()
-RETURNS TRIGGER AS $$
-BEGIN
-  IF NEW.air_date < CURRENT_DATE AND NEW.status = 'upcoming' THEN
-    NEW.status := 'aired';
-  END IF;
-
-  RETURN NEW;
-END;
-$$ LANGUAGE plpgsql;