Cannot get $GITHUB_STEP_SUMMARY use rest api

GitHub Ecosystem REST API
#1

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

#2

there no related thing in this docs too:

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