Bump akhileshns/heroku-deploy from 3.12.12 to 3.13.15 (#5102)

Bumps [akhileshns/heroku-deploy](https://github.com/akhileshns/heroku-deploy) from 3.12.12 to 3.13.15.
- [Release notes](https://github.com/akhileshns/heroku-deploy/releases)
- [Commits](https://github.com/akhileshns/heroku-deploy/compare/v3.12.12...v3.13.15)

---
updated-dependencies:
- dependency-name: akhileshns/heroku-deploy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/companion-deploy.yml

@@ -82,7 +82,7 @@ jobs:
         run: |
           sed -i 's/^EXPOSE 3020$/EXPOSE $PORT/g' Dockerfile
       - name: Deploy to heroku
-        uses: akhileshns/heroku-deploy@v3.12.12
+        uses: akhileshns/heroku-deploy@581dd286c962b6972d427fcf8980f60755c15520  # v3.13.15
         with:
           heroku_api_key: ${{secrets.HEROKU_API_KEY}}
           heroku_app_name: companion-demo