Bump docker/login-action from 1.9.0 to 3.0.0 (#69)

Bumps [docker/login-action](https://github.com/docker/login-action) from 1.9.0 to 3.0.0.
- [Release notes](https://github.com/docker/login-action/releases)
- [Commits](docker/login-action@28218f9...343f7c4)

---
updated-dependencies:
- dependency-name: docker/login-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/sign-container.yaml

@@ -42,7 +42,7 @@ jobs:
       # https://github.com/docker/login-action
       - name: Log into registry
         if: github.event_name != 'pull_request'
-        uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+        uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}