ref name?

.github/workflows/transient_up.yml

@@ -24,7 +24,7 @@ jobs:
             const response = await github.rest.repos.createDeployment({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              ref: github.head_ref,
+              ref: github.ref_name,
               environment: 'ephemeral',
               description: 'Spinning up ephemeral environment',
               transient_environment: true,