Clarify/fix conda instructions (#547)

* Clarify/fix conda instructions

* Apply suggestions from code review

Co-authored-by: david qiu <david@qiu.dev>

---------

Co-authored-by: david qiu <david@qiu.dev>

README.md

@@ -63,10 +63,11 @@ If you are not using JupyterLab and you only want to install the Jupyter AI `%%a
 
 ### With conda
 
-First, install
-[conda](https://conda.io/projects/conda/en/latest/user-guide/install/index.html).
+As an alternative to using `pip`, you can install `jupyter-ai` using
+[Conda](https://conda.io/projects/conda/en/latest/user-guide/install/index.html)
+from the `conda-forge` channel:
 
-    $ conda install jupyter_ai
+    $ conda install -c conda-forge jupyter_ai
 
 ## The `%%ai` magic command