fix apollo server initialization in api-routes-apollo-server-and-client example

[none23]

I faced an issue similar to this one when using the code from the api-routes-apollo-server-and-client example. As suggested by this comment, passing typeDefs and resolvers both to makeExecutableSchema(...) and to new ApolloServer(...) results in two different schemas.

[lfades]

@none23 Looks good, thank you 😌