Bump peter-evans/dockerhub-description from 2 to 3

Bumps [peter-evans/dockerhub-description](https://github.com/peter-evans/dockerhub-description) from 2 to 3.
- [Release notes](https://github.com/peter-evans/dockerhub-description/releases)
- [Commits](https://github.com/peter-evans/dockerhub-description/compare/v2...v3)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/update-docker-readme.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Docker Hub Description
-        uses: peter-evans/dockerhub-description@v2
+        uses: peter-evans/dockerhub-description@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}