Bump _external/resources/wcag-act-rules from cba7d1c to ea126c9 (#1895)

Bumps [_external/resources/wcag-act-rules](https://github.com/w3c/wcag-act-rules) from `cba7d1c` to `ea126c9`.
- [Commits](w3c/wcag-act-rules@cba7d1c...ea126c9)

---
updated-dependencies:
- dependency-name: _external/resources/wcag-act-rules
  dependency-version: ea126c9401c12e8250f383dae28b0372736e6ac4
  dependency-type: direct:production
...

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