fix in DTOutput when using namespace

[jos4uke]

Hi @ColinFay

There is a missing namespace when accessing the return function "dt" from the server:

golemexamples/golemshinydash/R/mod_name_of_module2.R

Line 14 in 46379d0

DT::DTOutput("dt")

It should be:

DT::DTOutput(ns("dt")) 

Best regards