Bump jtalk/url-health-check-action from 3.2 to 4 (#458)

Bumps [jtalk/url-health-check-action](https://github.com/jtalk/url-health-check-action) from 3.2 to 4.
- [Release notes](https://github.com/jtalk/url-health-check-action/releases)
- [Commits](Jtalk/url-health-check-action@v3.2...v4)

---
updated-dependencies:
- dependency-name: jtalk/url-health-check-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/heroku.yaml

@@ -35,7 +35,7 @@ jobs:
     # Check that the deployed app returns successful HTTP response.
     steps:
       - id: health_check
-        uses: jtalk/url-health-check-action@v3.2
+        uses: jtalk/url-health-check-action@v4
         with:
           url: ${{ github.event.deployment.payload.web_url }}
           follow-redirect: true