KT w/ Kafka Streams: run your app to CCloud

For any KT with Kafka Streams, in the run your app to CCloud section (e.g. https://kafka-tutorials.confluent.io/create-stateful-aggregation-sum/kstreams.html#run-your-app-to-confluent-cloud) it will fail unless the user is instructed to modify the properties file with `replication.factor=3`.

Error:

```
PolicyViolationException: Topic replication factor must be 3
```