Fix version tag for upload-artifcat

Author: joewallwork

template/.github/workflows/render_joss_paper.yml.jinja

@@ -61,7 +61,7 @@ jobs:
 
       # Upload the paper build
       - name: Upload draft PDF
-        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v4
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: paper
           path: paper/paper.pdf