add additional instruction to readme

Signed-off-by: Jonathan Spruce <jonathan.spruce@ibm.com>

Author: jonathan-spruce

README.md

@@ -17,6 +17,7 @@ This extension provides code highlighting showing relative time spent in Java me
 With Visual Studio Code:
 
 - Open your Java Liberty Project's Performance Dashboard by right-clicking on the project in the Codewind section of Visual Studio Code and selecting `Open Performance Dashboard`.
+- Once the Performance Dashboard opens, click `Run Load Test`.
 - Once the test has completed, it will create profiling data in a `load-test/[timestamp]/xxxx.hcd` file in your Codewind project.
 - In Visual Studio Code open a Java file in your project.
 - The extension will highlight any methods which were found in the profiling data and annotate them to show the percentage of time they were running on the CPU during profiling.