Update adding-bootstrap.md (#7853)

Xuhao · andriijas · commit 9455ec518012 · 2019-10-21T09:29:55.000+02:00
typo fix
diff --git a/docusaurus/docs/adding-bootstrap.md b/docusaurus/docs/adding-bootstrap.md
@@ -39,7 +39,7 @@ To enable `scss` in Create React App you will need to install `node-sass`.
 npm install --save node-sass
 ```
 
-Alternatively you may use `yarn`::
+Alternatively you may use `yarn`:
 
 ```sh
 yarn add node-sass
