docs: Fix code example for split button dropdowns (#1963)
docs: Fix code example for split button dropdowns (#1963)

Co-authored-by: Kyle Tsang <e876cd91ddb9d1dc82f7fe5c275508c8283a617e@users.noreply.github.com>
reactstrap/reactstrap,reactstrap/reactstrap,reactstrap/reactstrap,reactstrap/reactstrap