Update Example Code to updated approach

[bensalcie]

'fun Modifier.constrainAs(ref: ConstrainedLayoutReference, constrainBlock: ConstrainScope.() -> Unit): Modifier' cannot be called in this context with an implicit receiver. Use an explicit receiver if necessary.

   TextField(value = "Search", onValueChange = {},modifier = Modifier.constrainAs(
               search,
               constrainBlock = {}
           ))