Update v2.0.0.md

fix typo

Author: zuta

upgrade-guides/v2.0.0.md

@@ -36,7 +36,7 @@ A codemod is much like Babel, but instead of converting your ES2015 code to ES5
 
 We now include singleton `history` instances for you to use in the router. They are `hashHistory` (hash-based URLs) and `browserHistory` (HTML5 pushState "pretty" URLs). They include any needed history wrappers (such as `useQueries`) so you don't have to write as much boilerplate as before.
 
-Another big change because of this is `history` is now a normal dependency. You no longer have to install and maintain `history` spearately. Batteries included!
+Another big change because of this is `history` is now a normal dependency. You no longer have to install and maintain `history` separately. Batteries included!
 
 ### No Default History