prepare.yml in mnconvert-1.46.0

- old
+ new

@@ -45,6 +45,6 @@
       - uses: actions/upload-artifact@v3
         with:
           name: ieee-test-input
           path: |
             ieee/stl/standards-1-7-DTD/standards-1-7-dtd/
-            ieee/samples/site/documents/p987.6/document.xml
+            ieee/samples/_site/documents/p987.6/document.xml