[Bug] Cooldown placeholder wrong

The placeholders for current cooldown and max cooldown are incorrect. According to the documentation, they would be:

Placeholder	Function
%mythic_binding_cooldown_current_[binding]%	The current cooldown
%mythic_binding_cooldown_max_[binding]%	The max cooldown

Instead, a reagent is required as a parameter:

%mythic_binding_cooldown_current_mana_1%

%mythic_binding_cooldown_max_mana_1%