s0artcl: tell hyperref to write unicode strings in PDF metadata

s0artcl.cls

@@ -34,7 +34,7 @@
 % ---
 \RequirePackage{xpatch}
 \RequirePackage{hyperref}
-\hypersetup{colorlinks=false,pdfborder=0 0 0}
+\hypersetup{unicode=true,colorlinks=false,pdfborder=0 0 0}
 \urlstyle{sf}
 
 % --- Page Layout