chore(deps): update akhileshns/heroku-deploy action to v3.15.15

Author: simon04

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
       run: |
         curl https://cli-assets.heroku.com/install.sh | sh
     - name: Deploy to Heroku
-      uses: akhileshns/heroku-deploy@e3eb99d45a8e2ec5dca08735e089607befa4bf28 # v3.14.15
+      uses: akhileshns/heroku-deploy@1b080913896a5d6d44a18e9e208f8eb1fee9b0f7 # v3.15.15
       with:
         heroku_api_key: ${{secrets.HEROKU_API_KEY}}
         heroku_app_name: "devdocs"