Fix broken link in 05_plotter_picker.mystnb (#698)

Author: AlejandroFernandezLuces

doc/source/examples/01_getting_started/05_plotter_picker.mystnb

@@ -171,7 +171,7 @@ plotter.plot(plot_list)
 ```
 
 The Python visualizer is used by default. However, you can also use
-`trame <https://kitware.github.io/trame/index.html>`_ for visualization.
+[trame](https://kitware.github.io/trame/index.html) for visualization.
 
 ```python