Balance idea: Adjust T2 Torpedo bombers fire cycle

[Tagada14]

Intended changes

Give each T2 torpedo bomber +2 projectiles and adjust damage per projectile accordingly to retain their dmg (750 per volley)

Thoughts on the changes

With the changes to torpedo defences that allowed them to target torpedo bombers projectiles and recent changes which allow torpedo defences to retarget the torpedo bombers became too weak vs targets with torpedo defences.

This is a balance idea from the balance team. It is not set in stone, it may be adjusted or rejected as the changes are tested.