include env option to continue-on-error

[zacharyburnett]

for some test envs that may fail, such as when testing development versions of dependencies, it would be useful to have a continue-on-error setting so that the failure of an expected unstable env does not make the entire status check fail

https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepscontinue-on-error

jobs.<job_id>.steps[*].continue-on-error
Prevents a job from failing when a step fails. Set to true to allow a job to pass when this step fails.