[doc] Update docs for installing from conda

Recommend conda-forge channel for taurus and pytango channels

Closes taurus-org#1172

doc/source/users/getting_started.rst

@@ -45,11 +45,13 @@ Installing in a conda environment (platform-independent)
 
 In a conda environment (we recommend creating one specifically for taurus)::
 
-    conda install -c conda-forge -c taurus-org taurus taurus_pyqtgraph
+    conda install -c conda-forge taurus taurus_pyqtgraph
 
 optionally, you may also want to install tango::
 
-    conda install -c tango-controls pytango
+    conda install -c conda-forge pytango
+
+Note: for windows, until pytango is available on conda-forge, you may need to use `-c tango-controls` to install pytango.
 
 
 Working from Git source directly (in develop mode)