fixing typo at the end

fperiago · fperiago · commit 64989ffd7046 · 2025-09-24T10:09:19.000+02:00
diff --git a/docs/user/research.rst b/docs/user/research.rst
@@ -654,4 +654,4 @@ Multi-fidelity NN
 Tutorial
 --------
 
-#. `An introductory course to PINNs and DeepONet <https://github.com/fperiago/pinn_deeponet_for_beginners>`
+#. `An introductory course to PINNs and DeepONet <https://github.com/fperiago/pinn_deeponet_for_beginners>`_
