Update README to use -c conda-forge

see #379 (comment)

Author: joshmoore

README.rst

@@ -33,9 +33,8 @@ to install it first, see `miniconda`_ for more details.
 
 To install ``omero-py`` using conda (preferred)::
 
-    conda create -n myenv -c ome python=3.8 zeroc-ice36-python
+    conda create -n myenv -c conda-forge python=3.8 omero-py
     conda activate myenv
-    conda install -c conda-forge omero-py
 
 Alternatively install ``omero-py`` using venv::