Use correct artifact package

Author: petermllrr

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

@@ -31,8 +31,9 @@ jobs:
         run: npm install
       - name: Build with Eleventy
         run: npx @11ty/eleventy
-      - name: Upload a Build Artifact
-        uses: actions/upload-artifact@v4.6.2
+      - name: Upload GitHub Pages artifact
+        id: deployment
+        uses: actions/upload-pages-artifact@v3.0.1
         with:
           path: ./_site/