multimedia/kmediafactory: Added a docbook fix.

Signed-off-by: dsomero <xgizzmo@slackbuilds.org>

multimedia/kmediafactory/kmediafactory.SlackBuild

@@ -70,6 +70,9 @@ find . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
+# Fix doctype version
+sed -i "s/V4.1.2-Based/V4.2-Based/" doc/en/index.docbook
+
 mkdir -p build
 cd build
   cmake \