downgraded actions/upload-pages-artifact to v3

Author: petesramek

.github/workflows/build.yml

@@ -243,7 +243,7 @@ jobs:
           git add -- ./docs
           git commit -m'updated docs:${{ env.assembly-version }}' -- ./docs
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v3
         with:
           path: './docs'
       - name: Deploy to GitHub Pages