refactor(reducers/index.js): import 'Actions' from store's types

use 'Actions' for combineReducers's second generic parameter

src/app/store/reducers/index.js

@@ -1,11 +1,14 @@
+// @flow strict
 /**
  * @module reducers
  */
 
 import { combineReducers } from 'redux';
 
+import type { Actions } from '@/store/types/Actions';
+
 import products from './products';
 
-export default combineReducers({
+export default combineReducers<{}, Actions>({
   products
 });