Bump peter-evans/dockerhub-description from 3 to 4

Bumps [peter-evans/dockerhub-description](https://github.com/peter-evans/dockerhub-description) from 3 to 4.
- [Release notes](https://github.com/peter-evans/dockerhub-description/releases)
- [Commits](peter-evans/dockerhub-description@v3...v4)

---
updated-dependencies:
- dependency-name: peter-evans/dockerhub-description
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build-containers.yml

@@ -41,14 +41,14 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           push: true
       - name: Push README
-        uses: peter-evans/dockerhub-description@v3
+        uses: peter-evans/dockerhub-description@v4
         with:
           repository: flowforge/forge-docker
           username: flowforge
           password: ${{ secrets.DOCKER_HUB_PASSWORD }}
           readme-filepath: docker-compose/README.md
       - name: Push README flowfuse
-        uses: peter-evans/dockerhub-description@v3
+        uses: peter-evans/dockerhub-description@v4
         with:
           repository: flowfuse/forge-docker
           username: flowfuse