Update update-doc.yml (fixed typos)

Author: LorenzoTettamanti

.github/workflows/update-doc.yml

@@ -26,7 +26,7 @@ jobs:
         run: mkdocs build
 
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v2
+        uses: actions/upload-pages-artifact@v3
         with:
           path: ./Doc