missing supported types in documentation

[wmeler]

https://allegro.github.io/turnilo/configuration-datacubes.html#override-native-druid-type doesn't mention types tested in https://github.com/allegro/turnilo/blob/master/src/common/models/measure/measure.mocha.ts
HLLSketch is worth mentioning, I would also consider adding attributeOverrides for multivalue types:

• name: multivalue_dimension
  type: SET/STRING
  nativeType: STRING