fixed error that scrpage2 is obsolete

MDT-SADA.cls

@@ -107,7 +107,7 @@
 \RequirePackage[utf8]{inputenc}
 \RequirePackage{ifthen}
 \RequirePackage{url}
-\RequirePackage[automark]{scrpage2}
+\RequirePackage[automark]{scrlayer-scrpage}
 \RequirePackage[\if@english british\else ngerman\fi]{babel}
 %\RequirePackage{lastpage}
 %\RequirePackage[ngerman,num]{isodate}