Vampiric Strike damage decreases when blocked

[twanvl]

this.damage -= m.currentBlock should be -. Otherwise the damage of the card permanently decreases by the blocked amount.

https://github.com/ShikiSeiren/NecroMod/blob/99b7eb7089861b1f7ab692f4df78fe5eb9691b6b/src/main/java/necromod/cards/Vampiric_Strike.java#L44