chore(deps): update akhileshns/heroku-deploy action to v3.13.15

Author: renovate[bot]

.github/workflows/deployment.yml

@@ -17,7 +17,7 @@ jobs:
         run: npm run migrate:deploy                          
         env:
           DATABASE_URL: ${{ secrets.DATABASE_URL }}
-      - uses: akhileshns/heroku-deploy@v3.12.12          
+      - uses: akhileshns/heroku-deploy@v3.13.15          
         with:
           heroku_api_key: ${{ secrets.HEROKU_API_KEY }}
           heroku_app_name: ${{ secrets.HEROKU_APP_NAME }}