Fix docs

Author: penelopeysm

src/sampler.jl

@@ -41,7 +41,7 @@ Generic sampler type for inference algorithms of type `T` in DynamicPPL.
 provided that supports resuming sampling from a previous state and setting initial
 parameter values. It requires to overload [`loadstate`](@ref) and [`initialstep`](@ref)
 for loading previous states and actually performing the initial sampling step,
-respectively. Additionally, sometimes one might want to implement [`initialsampler`](@ref)
+respectively. Additionally, sometimes one might want to implement [`init_strategy`](@ref)
 that specifies how the initial parameter values are sampled if they are not provided.
 By default, values are sampled from the prior.
 """