docs: document --config for SmartUI CLI exec#14

RushilK7 merged 1 commit intoLambdaTest:mainLambdaTest/smartui-java-testng-sample:mainfrom

RushilK7:docs/smartui-cli-config-readmeRushilK7/smartui-java-testng-sample:docs/smartui-cli-config-readmeCopy head branch name to clipboard