message: fix wrong mutation names
diff: @@ -183,7 +183,7 @@ means that we'll need to create an updater that automatically adds the `Todo` to
  cacheExchange({
  updates: {
  Mutation: {
  - updateTodoDate(result, _args, cache, _info) {
  + createTodo(result, _args, cache, _info) {
  const TodoList = gql`
  {
  todos {
  @@ -229,7 +229,7 @@ rewritten to use `cache.link` and `cache.resolve` rather than `cache.updateQuery
  cacheExchange({
  updates: {
  Mutation: {
  - updateTodoDate(result, _args, cache, _info) {
  + createTodo(result, _args, cache, _info) {
  const todos = cache.resolve('Query', 'todos');
  if (Array.isArray(todos)) {
  todos.push(result.createTodo);
  