[docs] Install ray from conda-forge instead of PyPi when using conda (r…

…ay-project#25296)

doc/source/ray-overview/installation.rst

@@ -227,18 +227,22 @@ If you use `Anaconda`_ (`installation instructions`_) and want to use Ray in a d
 
 .. code-block:: bash
 
- conda create --name ray
+ conda config --env --add channels conda-forge
+ conda env create -n ray # works with mamba too
  conda activate ray
- conda install --name ray pip
- pip install ray
+ pip install ray # or `conda install ray-core`
 
-Use ``pip list`` to confirm that ``ray`` is installed.
-
-.. _`Anaconda`: https://www.anaconda.com/
-.. _`installation instructions`: https://docs.anaconda.com/anaconda/install/index.html
+For a complete list of available ``ray`` libraries on Conda-forge, have a look
+at: https://github.com/conda-forge/ray-packages-feedstock
 
+.. note::
 
+ Ray conda packages are maintained by the community, not the Ray team. While
+ using a conda environment, it is recommended to install Ray from PyPi using
+ `pip install ray` in the newly created environment.
 
+.. _`Anaconda`: https://www.anaconda.com/
+.. _`installation instructions`: https://docs.anaconda.com/anaconda/install/index.html
 
 Building Ray from Source
 ------------------------