chore: update production description in readme (#8212)

* Update README.md

update the production readiness description, and also other descriptions to be in sync with the user doc

* Update README.md

apply bold style

README.md

@@ -6,12 +6,14 @@
 [![Build status](https://badge.buildkite.com/9394d2bca0f87e2e97aa78b25f765c92d4207c0b65e7f6648f.svg)](https://buildkite.com/risingwavelabs/main)
 [![codecov](https://codecov.io/gh/risingwavelabs/risingwave/branch/main/graph/badge.svg?token=EB44K9K38B)](https://codecov.io/gh/risingwavelabs/risingwave)
 
-**RisingWave is now ready for production! Curious about the use cases? More details coming soon!**
+**RisingWave has achieved production-readiness and has been effectively deployed in dozens of companies across a diverse range of industries, including entertainment, fintech, social media, and manufacturing.**
 
-RisingWave is a cloud-native streaming database that uses SQL as the interface language. It is designed to reduce the complexity and cost of building real-time applications. RisingWave consumes streaming data, performs continuous queries, and updates results dynamically. As a database system, RisingWave maintains results inside its own storage and allows users to access data efficiently.
+RisingWave is a distributed SQL database for stream processing. It is designed to reduce the complexity and cost of building real-time applications. RisingWave consumes streaming data, performs incremental computations when new data comes in, and updates results dynamically. As a database system, RisingWave maintains results inside its own storage so that users can access data efficiently.
 
 RisingWave ingests data from sources like Apache Kafka, Apache Pulsar, Amazon Kinesis, Redpanda, and materialized CDC sources.
 
+Data in RisingWave can be output to external targets such as message brokers, data warehouses, and data lakes for storage or additional processing.
+
 Learn more at [Introduction to RisingWave](https://www.risingwave.dev/docs/current/intro/).
 
 ## Quick Start