Fix error typo.

README.md

@@ -42,7 +42,7 @@ at [getcomposer.org](http://getcomposer.org/doc/00-intro.md#installation-nix).
 You can then install this project template using the following command:
 
 ```shell
-composer create-project --prefer-dist --stability dev yii-extension/app-bulma-bulma <your project>
+composer create-project --prefer-dist --stability dev yii-extension/app-bulma <your project>
 ```
 
 Now you should be able to access the application through the following URL, assuming `app` is the directory