Update confluent-setup.md

Author: cnb0

kfk.confluent/confluent-setup.md

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 ## Confluent platform setup 
 
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 - Get started with Confluent Platform
         Confluent Platform is a streaming platform that enables you to organize and manage data from 
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                - [Confluent Cloud Demos Overview](https://docs.confluent.io/current/tutorials/examples/ccloud/docs/ccloud-demos-overview.html#ccloud-demos-overview)
 
 
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 Manual : 
     - Quick Start for Apache Kafka using Confluent Platform (Local)  - GUI 
         -  Setup Confluent Platform and its main components in a dev environment.