zizmor's self-repository audit flags the workspace-relative `./...`
form for referencing the in-repo change-detector action. GitHub's
`$/...` self-repository syntax is not subject to runtime filesystem
state and is treated as a pinned reference for policy enforcement.
Other workflows (e.g. superset-python-unittest.yml,
superset-playwright.yml) already use this form for the same action.
Resolves code-scanning alert #2640.
Co-Authored-By: Evan Rusackas <evan@preset.io>
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>