docs: Update apify.ipynb for Document class import (#19598)

- **Description:**
Update to correctly import Document class -
from langchain_core.documents import Document

- **Issue:**
Fixes the notebook and the hosted documentation
[here](https://python.langchain.com/docs/integrations/tools/apify)

Co-authored-by: Bagatur <22008038+baskaryan@users.noreply.github.com>

docs/docs/integrations/tools/apify.ipynb

@@ -41,8 +41,8 @@
    "outputs": [],
    "source": [
     "from langchain.indexes import VectorstoreIndexCreator\n",
-    "from langchain_community.document_loaders.base import Document\n",
-    "from langchain_community.utilities import ApifyWrapper"
+    "from langchain_community.utilities import ApifyWrapper\n",
+    "from langchain_core.documents import Document"
    ]
   },
   {