docs(readme): fix the link of tutorial url

README.rst

@@ -25,7 +25,7 @@ trame-vtk can be installed with `pip <https://pypi.org/project/trame-vtk/>`_:
 Usage
 -----------------------------------------------------------
 
-The `Trame Tutorial <https://kitware.github.io/trame/docs/tutorial.html>`_ is the place to go to learn how to use the library and start building your own application.
+The `Trame Tutorial <https://kitware.github.io/trame/guide/tutorial/>`_ is the place to go to learn how to use the library and start building your own application.
 
 The `API Reference <https://trame.readthedocs.io/en/latest/index.html>`_ documentation provides API-level documentation.