Document `type = "linear_pred"` better

[hfrick]

type = "linear_pred" is not listed in the options for type but should be. It's mentioned in the section on censored regression but should also be mentioned in the Value/return section.

parsnip/R/predict.R

Lines 9 to 11 in 77e0822

	#' @param type A single character value or `NULL`. Possible values
	#' are `"numeric"`, `"class"`, `"prob"`, `"conf_int"`, `"pred_int"`,
	#' `"quantile"`, `"time"`, `"hazard"`, `"survival"`, or `"raw"`. When `NULL`,