HDDS-6969. Add link to compose directory in smoketest README (#3567)

Author: kaijchen

hadoop-ozone/dist/src/main/smoketest/README.md

@@ -29,7 +29,7 @@ The current configuration in the robot files (hostnames, ports) are adjusted for
 
 # Run tests in docker environment
 
-In the ./compose folder there are additional test scripts to make it easy to run all tests or run a specific test in a docker environment.
+In the [compose](../compose) folder there are additional test scripts to make it easy to run all tests or run a specific test in a docker environment.
 
 ## Test one environment
 
@@ -60,4 +60,4 @@ cd compose/ozone
 docker-compose up -d
 #wait....
 ../test-single.sh scm basic/basic.robot
-```
+```