Cannot get $GITHUB_STEP_SUMMARY use rest api

https://docs.github.com/en/rest/checks/suites#get-a-check-suite

our workflow will echo some info to $GITHUB_STEP_SUMMARY (Workflow commands for GitHub Actions - GitHub Docs ),but cannot get it through rest api

there no related thing in this docs too:

https://docs.github.com/en/rest/actions/workflow-jobs