Added conda-forge details to installation instructions (#266)

* README now includes a link to adding conda-forge

* removed extra bracket

README.md

@@ -13,7 +13,7 @@ Refer to [WecOptTool documentation](https://sandialabs.github.io/WecOptTool/) fo
 WecOptTool requires Python >= 3.8. Python 3.9 & 3.10 are supported.
 It is strongly recommended you create a dedicated virtual environment (e.g., using `conda`, `venv`, etc.) before installing `wecopttool`.
 
-**Option 1** - using `Conda`:
+**Option 1** - using `Conda` (requires having `conda-forge` added as a channel in your environment, see instructions [here](https://conda-forge.org/docs/user/introduction.html#how-can-i-install-packages-from-conda-forge)):
 
 ```bash
 conda install -c conda-forge wecopttool