Updated readme

Author: Naveen481

README.md

@@ -17,7 +17,7 @@ This repository allows you to install [Apache Airflow](https://airflow.apache.or
 - RHEL 6 & 7
 
 ## Installing the CSD
-1. Download the Jar file.  [Airflow CSD](http://archive.clairvoyantsoft.com/airflow/parcels/latest/AIRFLOW-<Airflow Version>.jar)
+1. Download the Jar file.  [Airflow CSD](http://archive.clairvoyantsoft.com/airflow/parcels/latest/AIRFLOW-{airflow_version}.jar)
 2. Copy the jar file to the `/opt/cloudera/csd` location on the Cloudera Manager server.
 3. Restart the Cloudera Manager Server service. `service cloudera-scm-server restart`