♻️ Balance cooldown of Cerberus' abilities

[kori4r2]

Overview

Cerberus' abilities only have 1 turn (actually 3, 1 for each head) cooldown, and the fight might be too difficult because of that, especially with Tremendous Roar getting increased duration as the heads die.

What code could be improved?

Assets/Scripts/Scriptable Objects/EnemiesAI/CerberusHead.cs

Additional Information

For conveniece it would be better to do this together with #38