Update help message for benchmark command (#2585)

---------

Co-authored-by: Mario Rodriguez Molins <[email protected]>

Author: philippkahr

README.md

@@ -187,10 +187,12 @@ For details on how to configure rally benchmarks for a package, review the [HOWT
 These benchmarks allow you to benchmark ingesting real time data.
 You can stream data to a remote ES cluster setting the following environment variables:
 
+```
 ELASTIC_PACKAGE_ELASTICSEARCH_HOST=https://my-deployment.es.eu-central-1.aws.foundit.no
 ELASTIC_PACKAGE_ELASTICSEARCH_USERNAME=elastic
 ELASTIC_PACKAGE_ELASTICSEARCH_PASSWORD=changeme
 ELASTIC_PACKAGE_KIBANA_HOST=https://my-deployment.kb.eu-central-1.aws.foundit.no:9243
+```
 
 #### System Benchmarks
 

cmd/benchmark.go

@@ -52,10 +52,12 @@ For details on how to configure rally benchmarks for a package, review the [HOWT
 These benchmarks allow you to benchmark ingesting real time data.
 You can stream data to a remote ES cluster setting the following environment variables:
 
+` + "```" + `
 ELASTIC_PACKAGE_ELASTICSEARCH_HOST=https://my-deployment.es.eu-central-1.aws.foundit.no
 ELASTIC_PACKAGE_ELASTICSEARCH_USERNAME=elastic
 ELASTIC_PACKAGE_ELASTICSEARCH_PASSWORD=changeme
 ELASTIC_PACKAGE_KIBANA_HOST=https://my-deployment.kb.eu-central-1.aws.foundit.no:9243
+` + "```" + `
 
 #### System Benchmarks