sync: Use goldmark instead of blackfriday

admin/sync/themes.go

@@ -1,6 +1,7 @@
 package sync
 
 import (
+	"bytes"
 	"fmt"
 	"image"
 	"image/jpeg"
@@ -13,7 +14,7 @@ import (
 	"unicode"
 
 	"github.com/gin-gonic/gin"
-	"github.com/russross/blackfriday/v2"
+	"github.com/yuin/goldmark"
 	"golang.org/x/image/draw"
 
 	"srs.epita.fr/fic-server/libfic"
@@ -143,7 +144,13 @@ func BuildTheme(i Importer, tdir string) (th *fic.Theme, errs []string) {
 		if err != nil {
 			errs = append(errs, fmt.Sprintf("%q: overview.txt: an error occurs during markdown formating: %s", tdir, err))
 		}
-		th.Headline = string(blackfriday.Run([]byte(th.Headline)))
+		var buf bytes.Buffer
+		err := goldmark.Convert([]byte(th.Headline), &buf)
+		if err != nil {
+			errs = append(errs, fmt.Sprintf("%q: overview.txt: an error occurs during markdown formating of the headline: %s", tdir, err))
+		} else {
+			th.Headline = string(buf.Bytes())
+		}
 	}
 
 	if i.exists(path.Join(tdir, "heading.jpg")) {