tdf#99227: remove unneeded specificity in unit test

The unit test should only be ensuring that the drawing is in
the footnote, not that it is located in the 5th character portion.

Change-Id: I58040dc3498b2e78000891a26b7188dfac6c72f7
Reviewed-on: https://gerrit.libreoffice.org/37906Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Reviewed-by: Justin Luth <justin_luth@sil.org>

sw/qa/extras/ooxmlexport/ooxmlexport9.cxx

@@ -461,7 +461,7 @@ DECLARE_OOXMLEXPORT_TEST(testTdf99227, "tdf99227.docx")
     if (!pXmlDoc)
         return;
 
-    assertXPath(pXmlDoc, "//w:footnote[3]/w:p/w:r[5]/w:drawing", 1);
+    assertXPath(pXmlDoc, "//w:footnote/w:p/w:r/w:drawing", 1);
 }
 
 DECLARE_OOXMLEXPORT_TEST(testTdf104162, "tdf104162.docx")