Update the diagrams on the [pub/sub pages](https://v1-16.docs.dapr.io/developing-applications/building-blocks/pubsub/) with new styled diagrams from the [Google SlideDeck](https://docs.google.com/presentation/d/1q70WNp4OEstpwgDhg7gXRAud2pu68RYAZrwQK9_sZGk/edit?usp=sharing).