Added dialogue when escaped with carrying Sety in chapters 4x and 6

I have added dialogue when escaped with carrying Sety at the end of Chapter 4x and Chapter 6.

I think that since the release of the game, some players have a delusion that if you leave the map with NPC Sety, might meet him in the next chapters. But in that case, Sety disappeared silently, this was very disappointing. So I decided to include an explanation of why Sety would not follow us.

There are 5 patterns for Chapter 4x: when Machyua, Brighton, Lara, or Asbel are still alive, or when none of the above 4 are left, Sety will call out to the surviving Magi members or Leif.

I gave Machyua a higher priority than Brighton because she did not talk to Sety in the original story.

Chapter 6 has only one pattern.