tdf#107197: Replace relationship URI

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>

oox/source/export/chartexport.cxx

@@ -516,7 +516,7 @@ void ChartExport::WriteChartObj( const Reference< XShape >& xShape, sal_Int32 nC
             sRelativeStream,
             pFS->getOutputStream(),
             "application/vnd.openxmlformats-officedocument.drawingml.chart+xml",
-            "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart",
+            rtl::OUStringToOString(oox::getRelationship(Relationship::CHART), RTL_TEXTENCODING_UTF8).getStr(),
             &sId );
 
     XmlFilterBase* pFB = GetFB();