feat(react): updated markdown code for buttons doc page
feat(react): updated markdown code for buttons doc page

pavlovicnemanja/superdesk-ui-framework,superdesk/superdesk-ui-framework,superdesk/superdesk-ui-framework,pavlovicnemanja/superdesk-ui-framework,pavlovicnemanja/superdesk-ui-framework,superdesk/superdesk-ui-framework