Related issue on GitHub: Node version of latest sonar-scanner · Issue #171 · SonarSource/sonar-scanner-cli-docker · GitHub and potential fix PR: https://github.com/SonarSource/sonar-scanner-cli-docker/pull/172
And looks like there already is a community issue tracking this: Sonarsource/sonarcloud-github-action failing with Node.js 12 error. Thought the container images were very new and thought this was something else initially.