Bump actions/upload-pages-artifact from 3 to 4 (#1373)

Author: dependabot[bot]

.github/workflows/docs.yml

@@ -59,7 +59,7 @@ jobs:
       - name: Upload artifacts using actions/upload-pages-artifact
         if: github.ref == 'refs/heads/main'
         id: deployment
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: ./docs/build/html