docs: update yarn install to yarn add (#907)

jamiehaywood · web-flow · commit 80a81c0dfaa0 · 2021-03-21T00:54:40.000+01:00
diff --git a/docs/README.md b/docs/README.md
@@ -99,7 +99,7 @@ npm uninstall husky
 1. Install `husky`
 
 ```shell
-yarn install husky --save-dev
+yarn add husky --dev
 yarn add pinst --dev # if your package is not private
 ```
 
