Update docbook doctype declarations.

doc/umbrello/index.docbook

@@ -1,6 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN"
- "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
  <!ENTITY umbrello "<application>Umbrello &UML; Modeller</application>">
  <!ENTITY kappname "&umbrello;">
  <!ENTITY packagename "tdesdk">

kapptemplate/kapp/index.docbook

@@ -3,7 +3,7 @@ $MKDIR $LOCATION_ROOT/doc/$APP_NAME_LC
 echo "It is better to use template.docbook instead of this - please replace it"
 cat << EOF > $LOCATION_ROOT/doc/$APP_NAME_LC/index.docbook
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY $APP_NAME_LC "$APP_NAME">
   <!ENTITY % addindex "IGNORE">
   <!ENTITY % English "INCLUDE" > <!-- change language only here -->