Fix little typo in the README

readme.md

@@ -384,7 +384,7 @@ Note that this plugin requires Git 1.9 or higher (because it uses the `--exit-co
   name: 'ProcessError' }
   ```
 
-The `gh-pages` module writes temporary files to a `node_modules/.cache/gh-pages` directory.  The location of this directory can be customized by setting the `CACHE_DIR` environemnt variable.
+The `gh-pages` module writes temporary files to a `node_modules/.cache/gh-pages` directory.  The location of this directory can be customized by setting the `CACHE_DIR` environment variable.
 
 If `gh-pages` fails, you may find that you need to manually clean up the cache directory.  To remove the cache directory, run `node_modules/gh-pages/bin/gh-pages-clean` or remove `node_modules/.cache/gh-pages`.