Update CHANGELOG.md

Some styling

Author: lorenc-tomasz

CHANGELOG.md

@@ -1,6 +1,6 @@
 # 1.2.8
 
-- Unify how `reset()` method works on iOS and Android. This change should close an issue: https://github.com/davodesign84/react-native-mixpanel/issues/258 `reset()` method will contain new params: `flushOnReset` and `autoGenerateNewUniqueId`. Reset method is backward compatible. More in README.md
+- Unify how `reset()` method works on iOS and Android. This change should close an issue: https://github.com/davodesign84/react-native-mixpanel/issues/258 `reset()` method contains new params: `flushOnReset` and `autoGenerateNewUniqueId` and it is backward compatible. More in README.md
 - Fix `sharedInstanceWithToken` method definition