The action apply-run is missing the run_link from outputs even though it's part of the final payload of the actual run.
This is a sample payload
{
"run_id": "run-5JiwDkFbfzKDYcYz",
"run_link": "https://app.terraform.io/app/<myOrg>/workspaces/<myworkspace>/runs/run-5JiwDkFbfzKDYcYz",
"run_status": "applied",
"status": "Success"
}
For context: some other action like create-run are already have this defined as an output