DOC: Fix broken link for mamba installation (#56176)

Fix broken link for mamba installation

Author: smij720

doc/source/development/contributing_environment.rst

@@ -86,7 +86,7 @@ Before we begin, please:
 Option 1: using mamba (recommended)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-* Install `mamba <https://mamba.readthedocs.io/en/latest/installation.html>`_
+* Install `mamba <https://mamba.readthedocs.io/en/latest/installation/mamba-installation.html>`_
 * Make sure your mamba is up to date (``mamba update mamba``)
 
 .. code-block:: none