Typo Silent -> Silence (#217)

docs/en/mutations.md

@@ -71,7 +71,7 @@ mutations: {
 
 > requires >=0.6.3
 
-In some scenarios you may not want the middlewares to record the state change. Multiple dispatches to the store in a short period or polled do not always need to be tracked. In these situations is may be considered appropriate to silent the mutations. 
+In some scenarios you may not want the middlewares to record the state change. Multiple dispatches to the store in a short period or polled do not always need to be tracked. In these situations is may be considered appropriate to silence the mutations. 
 
 *Note:* This should be avoided where possible. Silent mutations break the contract of all state changes being tracked by the devtool. Use sparingly and where absolutely necessary.