Fix typo in blocks package

packages/blocks/README.md

@@ -19,7 +19,7 @@ follow to add your own custom blocks to WordPress's editor interfaces.
 Install the module
 
 ```bash
-npm install @wordpress/bocks --save
+npm install @wordpress/blocks --save
 ```
 
 _This package assumes that your code will run in an ES5 environment. If you're using an environment that has limited or no support for ES5 such as lower versions of IE then using [@babel/polyfill](https://babeljs.io/docs/en/next/babel-polyfill) will add support for these methods. Learn more about it in [Babel docs](https://babeljs.io/docs/en/next/caveats)._