Update README.md

added link to the pubsub solution to mirror the redis paragraph

Author: yufengg

README.md

@@ -9,4 +9,5 @@ The first app, in the `redis` subdirectory, uses [Redis](http://redis.io/).
 Documentation for this example can be found on the Google Cloud Platform site:
 https://cloud.google.com/solutions/real-time-analysis/kubernetes-redis-bigquery
 
-The second app, in the `pubsub` directory, uses [Google Cloud PubSub](https://cloud.google.com/pubsub/docs) instead of Redis.
+The second app, in the `pubsub` directory, uses [Google Cloud PubSub](https://cloud.google.com/pubsub/docs) instead of Redis. Documentation for this example can be found on the Google Cloud Platform site:
+https://cloud.google.com/solutions/real-time/kubernetes-pubsub-bigquery