tdf#94804: prefix to save cross reference bookmark fixed

bookmarks as references to numbered paragraphs are now saved
using the prefix '__RefNumPara__' as the import already expects

Change-Id: I6f7c41e95fa9f936a7eb21d4cb7461d4575c492a
Reviewed-on: https://gerrit.libreoffice.org/19229Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>
(cherry picked from commit 85eb4d95)
Reviewed-on: https://gerrit.libreoffice.org/19336Tested-by: Michael Stahl <mstahl@redhat.com>

sw/source/core/crsr/crossrefbookmark.cxx

@@ -84,7 +84,7 @@ namespace sw { namespace mark
         const vcl::KeyCode& rCode,
         const OUString& rName,
         const OUString& rShortName)
-        : CrossRefBookmark(rPaM, rCode, rName, rShortName, IDocumentMarkAccess::GetCrossRefHeadingBookmarkNamePrefix())
+        : CrossRefBookmark(rPaM, rCode, rName, rShortName, CrossRefNumItemBookmark_NamePrefix)
     { }
 
     bool CrossRefNumItemBookmark::IsLegalName(const OUString& rName)