update_start(): fix docstring typo

Co-authored-by: Maximilian-Stefan-Ernst <34346372+Maximilian-Stefan-Ernst@users.noreply.github.com>

Author: alyst

src/frontend/specification/ParameterTable.jl

@@ -315,7 +315,7 @@ update_estimate!(partable::AbstractParameterTable, fit::SemFit) =
     update_start!(partable::AbstractParameterTable, fit::SemFit)
     update_start!(partable::AbstractParameterTable, model::AbstractSem, start_val; kwargs...)
 
-Write starting values from `fit` or `start_val` to the `:estimate` column of `partable`.
+Write starting values from `fit` or `start_val` to the `:start` column of `partable`.
 
 # Arguments
 - `start_val`: either a vector of starting values or a function to compute starting values