Bump _external/resources/wcag-act-rules from 2c79c19 to 7d51385 (#1159)

Bumps [_external/resources/wcag-act-rules](https://github.com/w3c/wcag-act-rules) from `2c79c19` to `7d51385`.
- [Commits](w3c/wcag-act-rules@2c79c19...7d51385)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]