Correcting the env variables for perf-test workflow

Editor assessment

The subject states the correction: environment variables for the perf-test workflow were corrected. The workflow is named, so the reader knows where the change lands, though which variables and what was wrong with them is unstated. The ci type matches. No scope is present. There is no body, acceptable for a small CI fix, though naming the affected variables would have cost little and helped. No footers appear. The gerund Correcting departs from imperative mood, a minor note on a clear, adequately scoped message.