changed to include sourcesanspro package

pandoc_meta.yaml

@@ -14,7 +14,7 @@ disable-fancy-override: False
 lang: de
 otherlangs: [en]
 papersize: a4paper
-mainfont: sourcesanspro
+mainfont: FreeSerif
 fontfamily: sourcecodepro
 fontfamilyoptions: ttdefault,scale=.8
 #fontsize: 10pt
@@ -37,4 +37,5 @@ gitinfo-options:
   - notags={HEAD}
 link-citations: True
 header-includes:
+  - '`\usepackage[default,scale]{sourcesanspro}`{=latex}'
 ---