Hello!
You can check out another community post on the same topic. We have a ticket in our backlog to make sure that SonarLint honors the sonarlint.ls.javaHome, even when the JRE is embedded. The ticket has a high priority and should be fixed soon, but meanwhile, as a workaround, you can follow the instructions specified here. I hope this helps 
Thanks a lot for your feedback,
Sophio