Fix attack of the tentacle dogs

[Aloxaf]

Summary

SUMMARY: Bugfixes "Fix attack of the tentacle dogs"

Purpose of change

mattack::tentacle hardcodes the target as the player. So the player will be hurt even if the dog is attacking an NPC.
And it's attack also ignores the armor and distance. (Considering its baseline difficulty is 0, I don't think this is a feature)

Describe the solution

1. Don't hardcode the target and limit its attack range to 3.
2. Set its baseline difficulity to 2.

Describe alternatives you've considered

Keep it as a feature?

Testing

1. Spawn an NPC.
2. Spawn a tentacle dog.
3. Let them fight.

Before

After

Additional context

[mlangsdorf]

Thank you for fixing another stupid hardcoded monster attack bug.