Bump double-great/accessibility-scan-action from 0.3.0 to 0.4.0

Bumps [double-great/accessibility-scan-action](https://github.com/double-great/accessibility-scan-action) from 0.3.0 to 0.4.0.
- [Release notes](https://github.com/double-great/accessibility-scan-action/releases)
- [Commits](double-great/accessibility-scan-action@v0.3.0...v0.4.0)

---
updated-dependencies:
- dependency-name: double-great/accessibility-scan-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/a11y.yml

@@ -20,7 +20,7 @@ jobs:
         run: npm ci && npm start &
 
       - name: Scan site
-        uses: double-great/accessibility-scan-action@v0.3.0
+        uses: double-great/accessibility-scan-action@v0.4.0
         with:
           url: http://localhost:8080
           inputUrls: http://localhost:8080?category=sans-serif,http://localhost:8080?tag=art+deco,http://localhost:8080/?variant=600&tag=modern&subset=greek&category=sans-serif