Fix ServiceTypes, ExcludeServiceTypes, and DocPath desktop file entries to match XDG specifications

diff --git a/krecipes/src/krecipes.desktop b/krecipes/src/krecipes.desktop
index 8591209..97fafad 100644
--- a/krecipes/src/krecipes.desktop
+++ b/krecipes/src/krecipes.desktop
@@ -6,7 +6,7 @@
 Exec=krecipes %i %m -caption "%c"
 Icon=krecipes
 Type=Application
-DocPath=krecipes/index.html
+X-DocPath=krecipes/index.html
 GenericName=Cooking Book
 GenericName[bg]=������������������ ����������
 GenericName[br]=Levr keginer