Fix failing check_links job (#14243)

docs/source/extension/documents.rst

@@ -38,7 +38,7 @@ communicate with each other.
 
 Models contain an instance of `ISharedDocument <https://jupyter-ydoc.readthedocs.io/en/latest/api/interfaces/ISharedDocument.html>`_
 that acts as data storage for the model's content. As of JupyterLab 4, the default data
-storage implementation is a `YDocument <https://jupyter-ydoc.readthedocs.io/en/latest/api/classes/YDocument.html>`_
+storage implementation is a `YDocument <https://jupyter-ydoc.readthedocs.io/en/latest/api/classes/YDocument-1.html>`_
 based on `Yjs <https://docs.yjs.dev>`_, a high-performance CRDT for building collaborative
 applications. Both the interface and the implementation are provided by the package
 `@jupyter/ydoc <https://github.com/jupyter-server/jupyter_ydoc>`_.