Update the README (#2216)

This is a minor improvement to the README.md.

Author: CCisGG

README.md

@@ -7,10 +7,10 @@ Cruise Control for Apache Kafka
 
 ### Introduction ###
   Cruise Control is a product that helps run Apache Kafka clusters at large scale. Due to the popularity of 
-  Apache Kafka, many companies have bigger and bigger Kafka clusters. At LinkedIn, we have ~7K+ Kafka brokers, 
+  Apache Kafka, many companies have increasingly large Kafka clusters with hundreds of brokers. At LinkedIn, we have 10K+ Kafka brokers, 
   which means broker deaths are an almost daily occurrence and balancing the workload of Kafka also becomes a big overhead. 
 
-  Kafka Cruise Control is designed to address this operation scalability issue.
+  Kafka Cruise Control is designed to address this operational scalability issue.
 
 ### Features ###
   Kafka Cruise Control provides the following features out of the box: