Documentation: Non persistent links

During the link check we found some references to `#title..` in respect to links to CGAL, these links work at the moment but are, by CGAL, generated links during runtime based on the HTML `<H...>` tags.
When a new paragraph or chapter is added these numbers will change and thus will the link point to the wrong place. All these items have also a more persistent reference anchor that is generated based on the `<name>` of the section (e.g. `\section <name> <description>`).
Therefore it is better to used the references based on the `<name>`.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/python/doc/alpha_complex_user.rst b/src/python/doc/alpha_complex_user.rst
index b060c86e..4082cd9d 100644
--- a/src/python/doc/alpha_complex_user.rst
+++ b/src/python/doc/alpha_complex_user.rst
@@ -178,11 +178,11 @@ Weighted version
 ^^^^^^^^^^^^^^^^
 
 A weighted version for Alpha complex is available. It is like a usual Alpha complex, but based on a
-`CGAL regular triangulation <https://doc.cgal.org/latest/Triangulation/index.html#title20>`_.
+`CGAL regular triangulation <https://doc.cgal.org/latest/Triangulation/index.html#TriangulationSecRT>`_.
 
 This example builds the weighted alpha-complex of a small molecule, where atoms have different sizes.
 It is taken from
-`CGAL 3d weighted alpha shapes <https://doc.cgal.org/latest/Alpha_shapes_3/index.html#title13>`_.
+`CGAL 3d weighted alpha shapes <https://doc.cgal.org/latest/Alpha_shapes_3/index.html#AlphaShape_3DBuildingBasicAlphaShapesForManyPoints>`_.
 
 Then, it is asked to display information about the alpha complex.