Fix terminological typo

Author: willtebbutt

src/contexts.jl

@@ -26,7 +26,7 @@ PriorContext() = PriorContext(nothing)
         vars::Tvars
     end
 
-The `LikelihoodContext` enables the computation of the log likelihood of the data when 
+The `LikelihoodContext` enables the computation of the log likelihood of the parameters when 
 running the model. `vars` can be used to evaluate the log likelihood for specific values 
 of the model's parameters. If `vars` is `nothing`, the parameter values inside the `VarInfo` will be used by default.
 """