Update CONTRIBUTING.md

typo fix

CONTRIBUTING.md

@@ -232,7 +232,7 @@ jlpm run build:packages
 
 ## [Writing Documentation](#writing-documenation)
 
-Documentation is written in Markdown and reStructuredText.  In particular, the documentation on our Read the Docs page is written in reStructuredText. To ensure that the Read the Docs page builds, you'll need to install the documentation dependencies with `conda`.  These dependencies are located in `docs/enviornment.yml`.  You can install the dependencies for building the documentations by creating a new conda environment:
+Documentation is written in Markdown and reStructuredText.  In particular, the documentation on our Read the Docs page is written in reStructuredText. To ensure that the Read the Docs page builds, you'll need to install the documentation dependencies with `conda`.  These dependencies are located in `docs/environment.yml`.  You can install the dependencies for building the documentation by creating a new conda environment:
 
 ```bash
 conda env create -f docs/environment.yml