replaced URI in oox/source/export/

Change-Id: Ida65ee05cd0dc66ccdd3253260c6523ffd5ceae2
Signed-off-by: Christian Barth <Christian.Barth@zoho.com>
Reviewed-on: https://gerrit.libreoffice.org/40996Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Julien Nabet <serval2412@yahoo.fr>