Fix broken QML Elements link in template.

The link in the sidebar to the QML elements page was broken after the
renaming of QtDeclarative to QtQml/QtQuick.

Change-Id: I0f9765861f928daaa2861b4aa70b05242bcf0955
Reviewed-by: Jerome Pasion <jerome.pasion@nokia.com>

doc/config/qt-html-templates-online.qdocconf

@@ -71,7 +71,7 @@ HTML.postheader = \
     "              <li class=\"defaultLink\"><a href=\"modules.html\">Modules</a></li>\n" \
     "              <li class=\"defaultLink\"><a href=\"namespaces.html\">Namespaces</a></li>\n" \
     "              <li class=\"defaultLink\"><a href=\"qtglobal.html\">Global Declarations</a></li>\n" \
-    "              <li class=\"defaultLink\"><a href=\"qtquick2-qdeclarativeelements.html\">QML elements</a></li>\n" \
+    "              <li class=\"defaultLink\"><a href=\"qtquick-elements.html\">QML elements</a></li>\n" \
     "            </ul> \n" \
     "          </div>\n" \
     "        </div>\n" \