fix jsfiddle example (#597)

The example on jsfiddle is broken. We need to update the external resources

docs/en/getting-started.md

@@ -39,6 +39,6 @@ Again, the reason we are committing a mutation instead of changing `store.state.
 
 Using store state in a component simply involves returning the state within a computed property, because the store state is reactive. Triggering changes simply means committing mutations in component methods.
 
-Here's an example of the [most basic Vuex counter app](https://jsfiddle.net/yyx990803/n9jmu5v7/).
+Here's an example of the [most basic Vuex counter app](https://jsfiddle.net/n9jmu5v7/341/).
 
 Next, we will discuss each core concept in much finer details, starting with [State](state.md).