chore(deps): update akhileshns/heroku-deploy digest to 581dd28 (#4263)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/production.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v2
         with:
           ref: release
-      - uses: akhileshns/heroku-deploy@9fd0f9faae4aa93a38d6f5e25b9128589f1371b0
+      - uses: akhileshns/heroku-deploy@581dd286c962b6972d427fcf8980f60755c15520
         with:
           heroku_api_key: ${{ secrets.HEROKU_API_KEY }}
           heroku_app_name: "odl-open-discussions"

.github/workflows/release-candiate.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/checkout@v2
         with:
           ref: release-candidate
-      - uses: akhileshns/heroku-deploy@9fd0f9faae4aa93a38d6f5e25b9128589f1371b0
+      - uses: akhileshns/heroku-deploy@581dd286c962b6972d427fcf8980f60755c15520
         with:
           heroku_api_key: ${{ secrets.HEROKU_API_KEY }}
           heroku_app_name: "odl-open-discussions-rc"