Update pages.yaml

Author: kpertsch

.github/workflows/pages.yaml

@@ -43,7 +43,7 @@ jobs:
         env:
           JEKYLL_ENV: production
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v1
+        uses: actions/upload-pages-artifact@v2
         with:
           path: "docs/_site/"