Continue, don't return

Signed-off-by: Etzelia <etzelia@hotmail.com>

src/main/java/xyz/etztech/qol/commands/CheckupCommand.java

@@ -33,7 +33,7 @@ public class CheckupCommand implements CommandExecutor {
             checkup = checkups.get(uuid);
             for (Player pl : checkup.players) {
                 if (pl.getUniqueId().equals(player.getUniqueId())) {
-                    return; // Don't check twice, even if they re-logged
+                    continue; // Don't check twice, even if they re-logged
                 }
             }
             checkup.players.add(player);