Update doc comment w suggested

Co-authored-by: Eric Hwang <ericyhwang@users.noreply.github.com>

src/Model/fn.ts

@@ -90,9 +90,8 @@ declare module './Model' {
      * It's not recommended to use this in most cases. Instead, to share reactive functions,
      * have the components import a shared function to pass to `model.start`.
      *
-     * @deprecated The use of named funcitons is deprecated. With typescript and modern tooling
-     * you get better type information, code navigation, and refactoring support that is lost
-     * when using named functions.
+     * @deprecated The use of named functions is deprecated. Instead, to share a reactive function,
+     * you should export it and then require/import it into each file that needs to use it.
      *
      * @param name name of the function to define
      * @param fn either a reactive function that accepts inputs and returns output, or