Bug repro case when using pull_request_target

[slorber]

PR is not to merge, but serve as a demonstration for bug at https://github.com/preactjs/compressed-size-action/issues/54

[github-actions[bot]]

Size Change: 0 B

Total Size: 75.5 kB

ℹ️ View Unchanged

| Filename | Size | Change | | :--- | :---: | :---: | | `index.js` | 75.5 kB | 0 B |

_{compressed-size-action}