After Gnome rebuff and reward reduce amounts

[Eika]

@Sirrian

It was pretty low yesterday, and we had to adjust it downwards a bit with the new spawn rate.

HOWEVER, during Vault Events - currently planned once per month - both the Vault Key drop rate AND the Gnome spawn rate will receive a significant boost.

No, Sirrian already confirmed it is there, but they reduced its drop rate. Thankfully we should get it for sure when the Vault Event starts, if not before.