BERLIN — The European Union should slap sanctions on Bosnian Serb leader Milorad Dodik for his efforts to get Serb-dominated areas in Bosnia to secede from the Balkan country, Germany’s new foreign minister said Monday. Annalena Baerbock, who took office last week, told reporters in Brussels that the situation in Bosnia-Herzegovina was “worrying” and the Bosnian Serb secession attempts were …