Formatting change in achievements resource

[mdashlw]

Tiered achievements now use %%value%% instead of %s as placeholder value.

This is a breaking change for end users of this resource. For example, Notifly and Plancke are affected.

{
  "name": "Hole in the Wall: Practice Makes Perfect",
  "description": "Obtain a total score of %%value%% in Hole in the Wall Qualifying & Finals",
  "tiers": [...]
}