use correct env variable

Author: larscom

.github/workflows/docker-publish.yml

@@ -31,6 +31,6 @@ jobs:
         uses: peter-evans/dockerhub-description@v2
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
           repository: larscom/gitlab-ci-dashboard
           short-description: ${{ github.event.repository.description }}