add slash

Author: aliciaaevans

.github/workflows/jekyll-gh-pages.yml

@@ -35,7 +35,7 @@ jobs:
         uses: actions/jekyll-build-pages@v1
         with:
           source: ./posts
-          destination: ./_site${{ github.head_ref || github.ref_name }} 
+          destination: ./_site/${{ github.head_ref || github.ref_name }} 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3