docs: Update README.md (#1555)

minor typo

Author: 57u

docs/README.md

@@ -50,7 +50,7 @@ For problem one, passing props can be tedious for deeply nested components, and
 
 So why don't we extract the shared state out of the components, and manage it in a global singleton? With this, our component tree becomes a big "view", and any component can access the state or trigger actions, no matter where they are in the tree!
 
-By defining and separating the concepts involved in state management and enforcing rules that maintain independece between views and states, we give our code more structure and maintainability.
+By defining and separating the concepts involved in state management and enforcing rules that maintain independence between views and states, we give our code more structure and maintainability.
 
 This is the basic idea behind Vuex, inspired by [Flux](https://facebook.github.io/flux/docs/overview.html), [Redux](http://redux.js.org/) and [The Elm Architecture](https://guide.elm-lang.org/architecture/). Unlike the other patterns, Vuex is also a library implementation tailored specifically for Vue.js to take advantage of its granular reactivity system for efficient updates.